Eroare de compilare: user.cpp:8: error: `a' was not declared in this scope user.cpp:8: error: `b' was not declared in this scope user.cpp:11: error: ISO C++ forbids declaration of `fprintf' with no type user.cpp:11: error: `int fprintf' redeclared as different kind of symbol /usr/include/stdio.h:322: error: previous declaration of `int fprintf(FILE*, const char*, ...)' user.cpp:11: error: initializer list being treated as compound expression user.cpp:11: error: syntax error before `{' token user.cpp: In function `int cmp_frac(const void*, const void*)': user.cpp:27: error: invalid use of undefined type `const struct frac' user.cpp:22: error: forward declaration of `const struct frac' user.cpp:27: error: invalid use of undefined type `const struct frac' user.cpp:22: error: forward declaration of `const struct frac' user.cpp:27: error: invalid use of undefined type `const struct frac' user.cpp:22: error: forward declaration of `const struct frac' user.cpp:27: error: invalid use of undefined type `const struct frac' user.cpp:22: error: forward declaration of `const struct frac' user.cpp: In function `void find_frac_3(int, int, int)': user.cpp:84: error: aggregate `frac f' has incomplete type and cannot be defined user.cpp:90: error: invalid application of `sizeof' to an incomplete type user.cpp:90: error: invalid conversion from `void*' to `frac*' user.cpp:94: error: invalid use of undefined type `struct frac' user.cpp:84: error: forward declaration of `struct frac' user.cpp:96: error: invalid use of undefined type `struct frac'