Main.cc: In function 'int main()':
Main.cc:9:10: error: 'i' was not declared in this scope
int a[i][j]={0};
^
Main.cc:9:13: error: 'j' was not declared in this scope
int a[i][j]={0};
^
Main.cc:15:13: error: 'a' was not declared in this scope
cin>>a[i][j];
^
Main.cc:18:13: error: 'b' was not declared in this scope
cin>>b[i][j];
^
Main.cc:23:24: error: 'a' was not declared in this scope
cout<<" "<