Compilare: main.cpp: In function 'int main()': main.cpp:21:14: warning: unused variable 'c' [-Wunused-variable] int n,nr,c=0,cc=-1; ^ main.cpp:21:18: warning: unused variable 'cc' [-Wunused-variable] int n,nr,c=0,cc=-1; ^~ main.cpp:19:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("elmaj.in","r",stdin); ^ main.cpp:20:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("elmaj.out","w",stdout); ^