View Compilation Error

0_0_34694578_17751.cpp:16:5: error: redefinition of 'int n'
 int n,m,a,b;
     ^
0_0_34694578_17751.cpp:14:5: note: 'int n' previously declared here
 int n,m,a,b;
     ^
0_0_34694578_17751.cpp:16:7: error: redefinition of 'int m'
 int n,m,a,b;
       ^
0_0_34694578_17751.cpp:14:7: note: 'int m' previously declared here
 int n,m,a,b;
       ^
0_0_34694578_17751.cpp:16:9: error: redefinition of 'int a'
 int n,m,a,b;
         ^
0_0_34694578_17751.cpp:14:9: note: 'int a' previously declared here
 int n,m,a,b;
         ^
0_0_34694578_17751.cpp:16:11: error: redefinition of 'int b'
 int n,m,a,b;
           ^
0_0_34694578_17751.cpp:14:11: note: 'int b' previously declared here
 int n,m,a,b;
           ^