Compilare: user.cpp: In function ‘int main()’: user.cpp:14:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&t,&n,&c); ^ user.cpp:20:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&m); ^ user.cpp:23:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x,&y); ^ user.cpp:75:9: warning: ‘cast’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (v[i].first==cast){ ^ user.cpp:35:27: warning: ‘can’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[i].first=can; ^