Run id: 138150

Main.cc: In function 'int sum(int)':
Main.cc:16:11: error: a function-definition is not allowed here before '{' token
 int main(){
           ^
Main.cc:21:1: error: expected '}' at end of input
 }
 ^
Main.cc:21:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^