How can you be sure that a program follows the ANSI C standard?

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Aman Juneja

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The ANSI C standard provides a predefined symbol named __STDC__ that is set to 1 when the compiler is enforcing strict ANSI standard conformance. If you want your programs to be 100 percent ANSI conformant, you should ensure that the __STDC__ symbol is defined. If the program is being compiled with non-ANSI...
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The ANSI C standard provides a predefined symbol named __STDC__ that is set to 1 when the compiler is enforcing strict ANSI standard conformance. If you want your programs to be 100 percent ANSI conformant, you should ensure that the __STDC__ symbol is defined. If the program is being compiled with non-ANSI options, the __STDC__ symbol is undefined. The following code segment shows how this symbol can be checked: #ifdef __STDC__ printf("Congratulations! You are conforming perfectly to the ANSI standards!\n"); #else printf("Shame on you, you nonconformist anti-ANSI rabble-rousing programmer!\n"); #endif read less
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The ANSI C standard provides a predefined symbol named __STDC__ that is set to 1 when the compiler is enforcing strict ANSI standard conformance. If you want your programs to be 100 percent ANSI conformant, you should ensure that the __STDC__ symbol is defined. If the program is being compiled with non-ANSI...
read more
The ANSI C standard provides a predefined symbol named __STDC__ that is set to 1 when the compiler is enforcing strict ANSI standard conformance. If you want your programs to be 100 percent ANSI conformant, you should ensure that the __STDC__ symbol is defined. If the program is being compiled with non-ANSI options, the __STDC__ symbol is undefined. The following code segment shows how this symbol can be checked: #ifdef __STDC__ printf("Congratulations! You are conforming perfectly to the ANSI standards!\n"); #else printf("Shame on you, you nonconformist anti-ANSI rabble-rousing programmer!\n"); #endif read less
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Trainer and Owner at Krishna InfoTech

It depends on compile you are using, all modern compilers follow ANSI C standard.
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B.E. Computer

#ifdef __STDC__ printf("You are conforming perfectly to the ANSI standards!\n"); #else printf("anti-ANSI programme!\n"); #endif _STD_ is a predefined symbol with value set to 1 or 0. if 1 then programme is follwowing strict ANSI C Standards. if 0 then not.
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follow this link. http://crackurinterview.com/how-can-you-be-sure-that-a-program-follows-the-ansi-c-standard-/answer-3678.html
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Expert Technical Trainer with 15 years of work experience

Use an ANSI C compiler like Dev C++ or g++
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Tutor

The programs to be 100 percent ANSI conformant, it should ensure that the __STDC__ symbol is defined. If the program is being compiled with non-ANSI options, the __STDC__ symbol is undefined.
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For gcc compiler use either -ansi flag or -std=c90 or -std=c++98 or -std=c++11
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Asst Professor

Hi Vibha, The ANSI C standard provides a predefined symbol named __STDC__ that is set to 1 when the compiler is enforcing strict ANSI standard conformance. If you want your programs to be 100 percent ANSI conformant, you should ensure that the __STDC__ symbol is defined.
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Having 17 years of teaching experience

ANSI C standard provides a predefined symbol _STDC_. To check whether your program follows ANSI C Standard you can write a #ifdef code like: #ifdef _STDC_ (if yes your code) #else (if no your code) #endif
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