How can you tell whether a program was compiled using C versus C++?

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Computer & Maths Professor

Use #ifdef __STDC__command.
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Many ways On Unix/Linux: 1. type nm executable name, if it show some funny names that means it is mangled C++ 2. type ldd executable name, it will show dependency libraries and if it shows C++ libraries then it is C++ code
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Teacher 4 You

use _LINE_
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The code below contains standard, pre-defined macros used at runtime to determine whether a C or C++ compiler was used to compile the code. For C compilers, it also determines the version of the C language standard that the compiler implements). #ifdef __cplusplus printf("C++ compiler\n"); #else #ifdef...
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The code below contains standard, pre-defined macros used at runtime to determine whether a C or C++ compiler was used to compile the code. For C compilers, it also determines the version of the C language standard that the compiler implements). #ifdef __cplusplus printf("C++ compiler\n"); #else #ifdef __STDC__ #if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) ||/*continue.. ...on the next line */ (defined(__GNUC__) && !defined(__STRICT_ANSI__)) printf("ANSI X3.159-1999 / ISO 9899:1999 (C99) compiler\n"); #else printf("ANSI X3.159-1989 (C89) / ISO/IEC 9899:1990 (C90) C compiler\n"); #endif #else printf("Pre-ANSI (K&R) C compiler\n"); #endif #endif or The code below determines whether a C or C++ compiler was used to compile the code at runtime: if (sizeof('c') != sizeof(int)) printf("C++ compiler\n"); else if ((unsigned char)1 < -1) printf("Pre-ANSI (K&R) C compiler\n"); else { int i; i = 1 //* */ +1; if (i == 2) printf("ANSI X3.159-1999 / ISO 9899:1999 (C99) compiler\n"); else printf("ANSI X3.159-1989 (C89) / ISO/IEC 9899:1990 (C90) C compiler\n");} read less
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