Eroare de compilare: main.cpp: In function 'int main()': main.cpp:14:20: warning: left operand of comma operator has no effect [-Wunused-value] for(int i=1;i,+n;++i) ^ main.cpp:18:25: error: 'mat' was not declared in this scope scanf("%d",&mat[i][j]); ^~~ main.cpp:23:13: error: 'j' was not declared in this scope for(j=1;j<=100;++i) ^ main.cpp:12:11: warning: unused variable 'm' [-Wunused-variable] int n,m; ^ main.cpp:10:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pietre2.in","r",stdin); ^ main.cpp:11:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pietre2.out","w",stdout); ^ main.cpp:13:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ Non zero exit status: 1