View Compilation Error

0_0_24291545_12249.cpp: In function 'int main()':
0_0_24291545_12249.cpp:22:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_24291545_12249.cpp:3:5: note: 'int main()' previously defined here
 int main()
     ^
0_0_24291545_12249.cpp: At global scope:
0_0_24291545_12249.cpp:36:1: error: expected unqualified-id before '--' token
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 ^