Compilare: user.cpp: In function ‘int main()’: user.cpp:362:15: warning: unused variable ‘vmin’ [-Wunused-variable] int c,m,n,vmin,vmax,i,sol=0,h; ^ user.cpp:363:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("compus.in","r",stdin); ^ user.cpp:364:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ user.cpp:384:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("compus.out","w",stdout); ^