Compilare: user.cpp: In function ‘int main()’: user.cpp:87:9: warning: unused variable ‘nratot’ [-Wunused-variable] int nratot=0; ^~~~~~ user.cpp:66:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("figuri.in" ,"r", stdin); ^ user.cpp:67:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("figuri.out" ,"w", stdout); ^ user.cpp:69:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &col, &lin, &n); ^ user.cpp:73:56: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d", &x1, &y1, &x2, &y2, &c); ^