Compilare: user.cpp: In function ‘int main()’: user.cpp:108:22: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[203]’ [-Wformat=] scanf("%s",&s); ^ user.cpp:104:17: warning: unused variable ‘au’ [-Wunused-variable] int n,m,i,j,au,a,b; ^ user.cpp:102:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bmatrix.in","r",stdin); ^ user.cpp:103:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bmatrix.out","w",stdout); ^ user.cpp:105:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:108:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); ^