C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Will C pgm compile on C++ compiler? Goto page 1, 2, 3, 4  Next          C++Talk.NET Forum Index -> C++ Language (Moderated) View previous topic :: View next topic   Author Message Ken Applequist Guest Posted: Wed Sep 15, 2004 11:36 pm    Post subject: Will C pgm compile on C++ compiler? I had C programming in school years ago and would like to play with it again. When I go online I only seem to be able to find C++ compilers. I know that C++ is object oriented, whereas C is not. I can get a good price on Visual C++ 6.0. Is there a way to run native C programs on a C++ compiler? Thanks, Ken [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Tabrez Iqbal Guest Posted: Thu Sep 16, 2004 11:09 am    Post subject: Re: Will C pgm compile on C++ compiler? "Ken Applequist" <apple07840 (AT) yahoo (DOT) com> wrote Quote: I had C programming in school years ago and would like to play with it again. When I go online I only seem to be able to find C++ compilers. I know that C++ is object oriented, whereas C is not. I can get a good price on Visual C++ 6.0. Is there a way to run native C programs on a C++ compiler? Thanks, Ken most of the C programs could be easily compiled using a C++ compiler unless you are using one of the recent additions to the language standard - C99("long long" etc). But if you write your C programs against the older standard of C you are safe, as long as you make sure to follow the "good" practices(for eg. in first versions of C, prototyping the functions before use was optional, but its mandatory in C++). tabrez [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Yevgen Muntyan Guest Posted: Thu Sep 16, 2004 11:15 am    Post subject: Re: Will C pgm compile on C++ compiler? Ken Applequist wrote: Quote: I had C programming in school years ago and would like to play with it again. When I go online I only seem to be able to find C++ compilers. Try http://www.bloodshed.net/devcpp.html Yevgen [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Jack Klein Guest Posted: Thu Sep 16, 2004 11:18 am    Post subject: Re: Will C pgm compile on C++ compiler? On 15 Sep 2004 19:36:56 -0400, "Ken Applequist" <apple07840 (AT) yahoo (DOT) com> wrote in comp.lang.c++.moderated: Quote: I had C programming in school years ago and would like to play with it again. When I go online I only seem to be able to find C++ compilers. I know that C++ is object oriented, whereas C is not. I can get a good price on Visual C++ 6.0. Is there a way to run native C programs on a C++ compiler? Thanks, Ken Every C++ compiler that I know of, and certainly every major commercial or open source C++ compiler, also compiles C. They either provide a separate compiler in the package, or compile either language with the same compiler. In Visual C++, just give your source files names ending in ".c", and they will be compiled as C automatically. While Visual C++ 6.0 is badly outdated for standard C++ conformance, it is actually quite at C90/95 standard conformance. But if you really want to be prepared to move to C++ as well, Visual C++ is not that good a choice. I understand that Visual C++ 7.1 is much better in standard C++, and the Visual Studio 2005 Express Beta, which you can download for free from Microsoft's web site has been good with what I have done with it so far. -- Jack Klein Home: http://JK-Technology.Com FAQs for comp.lang.c http://www.eskimo.com/~scs/C-faq/top.html comp.lang.c++ http://www.parashift.com/c++-faq-lite/ alt.comp.lang.learn.c-c++ http://www.contrib.andrew.cmu.edu/~ajo/docs/FAQ-acllc.html [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Nicolas Pavlidis Guest Posted: Fri Sep 17, 2004 1:59 am    Post subject: Re: Will C pgm compile on C++ compiler? "Ken Applequist" <apple07840 (AT) yahoo (DOT) com> writes: Quote: I had C programming in school years ago and would like to play with it again. When I go online I only seem to be able to find C++ compilers. I know that C++ is object oriented, whereas C is not. I can get a good price on Visual C++ 6.0. Is there a way to run native C programs on a C++ compiler? It is called C ++, you understand , no sorry. It works but you will have to change the headers, here is an example: In C you include stdio.h In C++ you include cstdio or stdlib.h has been moved to cstdlib But if you wanna play learn C++, there is much more to play with it :-) Kind regards, Nicolas -- Quote: Nicolas Pavlidis | Elvis Presly: | |__ | Student of SE & KM | "Into the goto" | |__| | [email]pavnic (AT) sbox (DOT) tugraz.at[/email] | ICQ #320057056 | | -------------------University of Technology, Graz----------------| [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Michiel Salters Guest Posted: Fri Sep 17, 2004 2:12 am    Post subject: Re: Will C pgm compile on C++ compiler? "Ken Applequist" <apple07840 (AT) yahoo (DOT) com> wrote Quote: I had C programming in school years ago and would like to play with it again. When I go online I only seem to be able to find C++ compilers. I know that C++ is object oriented, whereas C is not. I can get a good price on Visual C++ 6.0. Is there a way to run native C programs on a C++ compiler? C++ is pretty much a superset of good C, so good programs should continue to run. Some C programs fail for trivial reasons, e.g. using "class" which then became a keyword. However, there are enough C compilers around. E.g. the VC++6 you mentioned is not a very good C++ compiler nowadays (it's 3 versions behind) but it also has a C compiler (despite the C++ name). That C compiler is less obsolete, as C didn't change much since 1990. VC++ switches automatically when compiling .c or .cpp files. GCC is also available, for free even. It too can compile C. Regards, Michiel Salters [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Francis Glassborow Guest Posted: Fri Sep 17, 2004 2:23 am    Post subject: Re: Will C pgm compile on C++ compiler? In article <42cd213e.0409152309.4a268bcb (AT) posting (DOT) google.com>, Tabrez Iqbal <tabrez19_i (AT) rediffmail (DOT) com> writes Quote: most of the C programs could be easily compiled using a C++ compiler unless you are using one of the recent additions to the language standard - C99("long long" etc). But if you write your C programs against the older standard of C you are safe, as long as you make sure to follow the "good" practices(for eg. in first versions of C, prototyping the functions before use was optional, but its mandatory in C++). As well as understand all the incompatibilities that can cause silent change to your program: int main(){ int i = 1; if(sizeof(int) > 1) i /= (sizeof('a') - 1); else i = 0; return 0 } Is fine as C and almost always contains a divide by zero error in C++ (the exceptions being implementations where sizeof(int) is one.) -- Francis Glassborow ACCU Author of 'You Can Do It!' see http://www.spellen.org/youcandoit For project ideas and contributions: http://www.spellen.org/youcandoit/projects [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top dietmar_kuehl@yahoo.com Guest Posted: Fri Sep 17, 2004 10:59 am    Post subject: Re: Will C pgm compile on C++ compiler? Ken Applequist wrote: Quote: I had C programming in school years ago and would like to play with it again. When I go online I only seem to be able to find C++ compilers. I know that C++ is object oriented, whereas C is not. I can get a good price on Visual C++ 6.0. Is there a way to run native C programs on a C++ compiler? Several authors implied that a C++ compiler can compile C programs. This is only correct with some restrictions. For example, you can obviously not use C++ keywords as identifiers. For example, the following is a legal C program but will fail using C++: int main() { int class = 0; return class; } There are a few other cases where C++ has stricter rules than C. For example, I think in C you can assign a 'void*' to an arbitrary pointer, e.g. an 'int*' without a cast. In C++ you need an appropriate cast. However, in general you will be better off using a C++ compiler anyway because C++ is a more powerful language :-) Note that you can get good priced C and C++ compilers other than Visual C++. For example, the GNU Compiler Collection (GCC) has both a free C and C++ compiler. Also, Comeau's C++ compiler is pretty cheap (only $50 for a conforming compiler; all other compilers are either more expensive or non-conforming - most are both). I think there is a fair selection of free C compilers around but I don't know their names because I'm not really that interested in C anymore. -- <mailto:dietmar_kuehl (AT) yahoo (DOT) com> <http://www.dietmar-kuehl.de/> <http://www.contendix.com> - Software Development & Consulting [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Francis Glassborow Guest Posted: Fri Sep 17, 2004 5:42 pm    Post subject: Re: Will C pgm compile on C++ compiler? In article <2qt9e2F136nevU7 (AT) uni-berlin (DOT) de>, Nicolas Pavlidis <pavnic (AT) sbox (DOT) tugraz.at> writes Quote: In C you include stdio.h In C++ you include cstdio You can do that but are certainly not required to. There are real incompatibilities but this is not one of them. -- Francis Glassborow ACCU Author of 'You Can Do It!' see http://www.spellen.org/youcandoit For project ideas and contributions: http://www.spellen.org/youcandoit/projects [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Michiel Salters Guest Posted: Sat Sep 18, 2004 11:15 am    Post subject: Re: Will C pgm compile on C++ compiler? Nicolas Pavlidis <pavnic (AT) sbox (DOT) tugraz.at> wrote Quote: "Ken Applequist" <apple07840 (AT) yahoo (DOT) com> writes: I had C programming in school years ago and would like to play with it again. When I go online I only seem to be able to find C++ compilers. I know that C++ is object oriented, whereas C is not. I can get a good price on Visual C++ 6.0. Is there a way to run native C programs on a C++ compiler? It is called C ++, you understand , no sorry. It works but you will have to change the headers, here is an example: In C you include stdio.h In C++ you include cstdio Actually, <stdio.h> will work better for old C programs. If you change to <cstdio>, you also need to change to std::printf. Regards, Michiel Salters [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Nicolas Pavlidis Guest Posted: Sun Sep 19, 2004 10:52 am    Post subject: Re: Will C pgm compile on C++ compiler? [email]Michiel.Salters (AT) logicacmg (DOT) com[/email] (Michiel Salters) writes: Quote: Nicolas Pavlidis <pavnic (AT) sbox (DOT) tugraz.at> wrote in message news:<2qt9e2F136nevU7 (AT) uni-berlin (DOT) de>... In C you include stdio.h In C++ you include cstdio Actually, <stdio.h> will work better for old C programs. If you change to <cstdio>, you also need to change to std::printf. No, I don't think so, but maybe I have a little missunderstanding: ----------8<-------------------snapp------------------------>8---------- #include<cstdio> int main() { printf("Hello World"); return(0); } ----------8<-------------------snipp------------------------>8---------- This piece of code compiles on g++ 3.4 without any errors or warnings. But it's true, that it is not necessary to change the headers. Regards, Nicolas -- Quote: Nicolas Pavlidis | Elvis Presly: | |__ | Student of SE & KM | "Into the goto" | |__| | [email]pavnic (AT) sbox (DOT) tugraz.at[/email] | ICQ #320057056 | | -------------------University of Technology, Graz----------------| [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top kanze@gabi-soft.fr Guest Posted: Mon Sep 20, 2004 7:07 pm    Post subject: Re: Will C pgm compile on C++ compiler? Nicolas Pavlidis <pavnic (AT) sbox (DOT) tugraz.at> wrote Quote: Michiel.Salters (AT) logicacmg (DOT) com (Michiel Salters) writes: Nicolas Pavlidis <pavnic (AT) sbox (DOT) tugraz.at> wrote in message news:<2qt9e2F136nevU7 (AT) uni-berlin (DOT) de>... In C you include stdio.h In C++ you include cstdio Actually, <stdio.h> will work better for old C programs. If you change to <cstdio>, you also need to change to std::printf. No, I don't think so, but maybe I have a little missunderstanding: ----------8<-------------------snapp------------------------>8---------- #include<cstdio int main() { printf("Hello World"); return(0); } ----------8<-------------------snipp------------------------>8---------- This piece of code compiles on g++ 3.4 without any errors or warnings. That's because of a bug in g++. Of course, just about every other compiler has the same bug. -- James Kanze GABI Software http://www.gabi-soft.fr Conseils en informatique orientée objet/ Beratung in objektorientierter Datenverarbeitung 9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34 [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top kanze@gabi-soft.fr Guest Posted: Mon Sep 20, 2004 7:08 pm    Post subject: Re: Will C pgm compile on C++ compiler? [email]Michiel.Salters (AT) logicacmg (DOT) com[/email] (Michiel Salters) wrote in message news:<fcaee77e.0409160306.27d6ae17 (AT) posting (DOT) google.com>... Quote: "Ken Applequist" <apple07840 (AT) yahoo (DOT) com> wrote in message news:<Sh%1d.4320$F75.1229@trndny01>... I had C programming in school years ago and would like to play with it again. When I go online I only seem to be able to find C++ compilers. I know that C++ is object oriented, whereas C is not. I can get a good price on Visual C++ 6.0. Is there a way to run native C programs on a C++ compiler? C++ is pretty much a superset of good C, so good programs should continue to run. Some C programs fail for trivial reasons, e.g. using "class" which then became a keyword. There is one major exception. C programs will generally use malloc to allocate memory, and it is generally considered bad pratice in C to cast the return value of malloc to the target type. This works in C, because a void* converts implicitly to any type of pointer, but this will not compile with C++. -- James Kanze GABI Software http://www.gabi-soft.fr Conseils en informatique orientée objet/ Beratung in objektorientierter Datenverarbeitung 9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34 [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Dietmar Kuehl Guest Posted: Tue Sep 21, 2004 11:40 am    Post subject: Re: Will C pgm compile on C++ compiler? Nicolas Pavlidis <pavnic (AT) sbox (DOT) tugraz.at> wrote: Quote: Michiel.Salters (AT) logicacmg (DOT) com (Michiel Salters) writes: Actually, <stdio.h> will work better for old C programs. If you change to <cstdio>, you also need to change to std::printf. No, I don't think so, but maybe I have a little missunderstanding: ----------8<-------------------snapp------------------------>8---------- #include<cstdio int main() { printf("Hello World"); return(0); } ----------8<-------------------snipp------------------------>8---------- This piece of code compiles on g++ 3.4 without any errors or warnings. If it does compile this code, gcc is not strictly standard conforming! (well, gcc is not [yet?] strictly standard conforming anyway) See 17.4.1.2 paragraph 4 of the C++ standard and the footnote to paragraph 7 of the same clause. If you have a quote from the standard which supports your position, let me know. However, at one of the most recent meetings (actually, I think on the last meeting) the library working group discussed the definition of C library names in the global namespace and generally agrees that this practise shall be legal. You might want to have a look at LWG Issue 456 (<http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#456>) whose resolution would sanction gcc's implementation. -- <mailto:dietmar_kuehl (AT) yahoo (DOT) com> <http://www.dietmar-kuehl.de/> <http://www.contendix.com> - Software Development & Consulting [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Nicolas Pavlidis Guest Posted: Tue Sep 21, 2004 6:39 pm    Post subject: Re: Will C pgm compile on C++ compiler? [email]dietmar_kuehl (AT) yahoo (DOT) com[/email] (Dietmar Kuehl) writes: Quote: Nicolas Pavlidis <pavnic (AT) sbox (DOT) tugraz.at> wrote: [email]Michiel.Salters (AT) logicacmg (DOT) com[/email] (Michiel Salters) writes: Actually, <stdio.h> will work better for old C programs. If you change to <cstdio>, you also need to change to std::printf. No, I don't think so, but maybe I have a little missunderstanding: ----------8<-------------------snapp------------------------>8---------- #include<cstdio int main() { printf("Hello World"); return(0); } ----------8<-------------------snipp------------------------>8---------- This piece of code compiles on g++ 3.4 without any errors or warnings. If it does compile this code, gcc is not strictly standard conforming! (well, gcc is not [yet?] strictly standard conforming anyway) See Comaeu 4.3.3 does not complain too (in strict mode). Quote: 17.4.1.2 paragraph 4 of the C++ standard and the footnote to paragraph 7 of the same clause. If you have a quote from the standard which supports your position, let me know. Ok. Quote: However, at one of the most recent meetings (actually, I think on the last meeting) the library working group discussed the definition of C library names in the global namespace and generally agrees that this practise shall be legal. You might want to have a look at LWG Issue 456 (<http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#456>) whose resolution would sanction gcc's implementation. Ok, thank you. Kind regards, Nicolas -- Quote: Nicolas Pavlidis | Elvis Presly: | |__ | Student of SE & KM | "Into the goto" | |__| | [email]pavnic (AT) sbox (DOT) tugraz.at[/email] | ICQ #320057056 | | -------------------University of Technology, Graz----------------| [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. 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