Compilare: user.cpp: In function ‘int main()’: user.cpp:13:19: warning: unused variable ‘mm’ [-Wunused-variable] int i,n,A,B,C,mm,c,cnt,m; ^ user.cpp:13:22: warning: unused variable ‘c’ [-Wunused-variable] int i,n,A,B,C,mm,c,cnt,m; ^ user.cpp:13:24: warning: unused variable ‘cnt’ [-Wunused-variable] int i,n,A,B,C,mm,c,cnt,m; ^ user.cpp:13:28: warning: unused variable ‘m’ [-Wunused-variable] int i,n,A,B,C,mm,c,cnt,m; ^ user.cpp:14:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.in", "r", stdin); ^ user.cpp:15:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.out", "w", stdout); ^ user.cpp:16:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d",&n,&A,&B,&C); ^