View Compilation Error

0_0_21813600_29235.cpp:42:11: error: redefinition of 'const int maxm'
 const int maxm=30;
           ^
0_0_21813600_29235.cpp:5:11: note: 'const int maxm' previously defined here
 const int maxm=30;
           ^
0_0_21813600_29235.cpp:43:11: error: redefinition of 'int a [30]'
 int a[maxm];
           ^
0_0_21813600_29235.cpp:6:5: note: 'int a [30]' previously declared here
 int a[maxm];
     ^
0_0_21813600_29235.cpp: In function 'int main()':
0_0_21813600_29235.cpp:44:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_21813600_29235.cpp:7:5: note: 'int main()' previously defined here
 int main()
     ^