Compilare: user.cpp: In function ‘int main()’: user.cpp:35:19: warning: unused variable ‘cer’ [-Wunused-variable] int i,j,r,max,cer,lin,col,dd; ^ user.cpp:35:31: warning: unused variable ‘dd’ [-Wunused-variable] int i,j,r,max,cer,lin,col,dd; ^ user.cpp:36:12: warning: unused variable ‘cul’ [-Wunused-variable] char c,cul; ^ user.cpp:37:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("vila.in","r",stdin); ^ user.cpp:38:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("vila.out","w",stdout); ^ user.cpp:39:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%c",&n,&m,&c); ^ user.cpp:42:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^ user.cpp:48:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^