View Compilation Error

0_0_37973599_26382.cpp:7:5: error: redefinition of 'int m'
 int m;
     ^
0_0_37973599_26382.cpp:5:7: note: 'int m' previously declared here
 int n,m;
       ^
0_0_37973599_26382.cpp:8:5: error: redefinition of 'int n'
 int n;
     ^
0_0_37973599_26382.cpp:5:5: note: 'int n' previously declared here
 int n,m;
     ^