View Compilation Error

0_0_13282762_12674.cpp: In function 'int main()':
0_0_13282762_12674.cpp:20:9: error: 'i' was not declared in this scope
     for(i=0;i<m;i++)
         ^
0_0_13282762_12674.cpp:23:10: error: 'j' was not declared in this scope
      for(j=0;j<n;j++)
          ^