View Compilation Error

0_0_20544901_24433.cpp:82:5: error: redefinition of 'int n'
 int n,m;
     ^
0_0_20544901_24433.cpp:6:5: note: 'int n' previously declared here
 int n,m;
     ^
0_0_20544901_24433.cpp:82:7: error: redefinition of 'int m'
 int n,m;
       ^
0_0_20544901_24433.cpp:6:7: note: 'int m' previously declared here
 int n,m;
       ^
0_0_20544901_24433.cpp:83:9: error: redefinition of 'int a [14]'
 int a[14];
         ^
0_0_20544901_24433.cpp:7:5: note: 'int a [14]' previously declared here
 int a[14];
     ^
0_0_20544901_24433.cpp:84:8: error: redefinition of 'struct matrix'
 struct matrix{ 
        ^
0_0_20544901_24433.cpp:8:8: error: previous definition of 'struct matrix'
 struct matrix{ 
        ^
0_0_20544901_24433.cpp: In function 'int main()':
0_0_20544901_24433.cpp:121:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_20544901_24433.cpp:45:5: note: 'int main()' previously defined here
 int main()
     ^