View Compilation Error

0_0_39727591_3624.cpp: In function 'int main()':
0_0_39727591_3624.cpp:16:17: error: 'i' was not declared in this scope
   16 |            for( i=0;i<m;++i){
      |                 ^
0_0_39727591_3624.cpp:17:25: error: 'j' was not declared in this scope
   17 |                    for( j=0;j<n;++j){
      |                         ^