Eroare de compilare: main.cpp: In member function 'double POINT::panta(const POINT&)': main.cpp:42:26: error: 'fabs' was not declared in this scope if(fabs(other.x-x) < eps) ^ main.cpp: In function 'int main()': main.cpp:75:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < slopes.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:54:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trapez.in","r",stdin); ^ main.cpp:55:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trapez.out","w",stdout); ^ main.cpp:57:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:60:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&tempx,&tempy); ^ Non zero exit status: 1