View Compilation Error

0_0_37133295_22844.cpp: In function 'int main()':
0_0_37133295_22844.cpp:54:5: error: redefinition of 'int main()'
 int main (void)
     ^
0_0_37133295_22844.cpp:20:5: note: 'int main()' previously defined here
 int main (void)
     ^