Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:18:20: error: ‘abs’ was not declared in this scope cmmdc = gcd(abs(a), abs(b)); ^ user.cpp:18:20: note: suggested alternative: In file included from user.cpp:2:0: /usr/include/c++/4.8/cmath:99:5: note: ‘std::abs’ abs(_Tp __x) ^ user.cpp:14:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &t); ^ user.cpp:17:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &a, &b, &c); ^