View Compilation Error

0_0_31748297_19098.cpp:3:11: error: '::main' must return 'int'
 void main()
           ^
0_0_31748297_19098.cpp: In function 'int main()':
0_0_31748297_19098.cpp:8:24: error: return-statement with no value, in function returning 'int' [-fpermissive]
         if(x==0&&y==0) return;
                        ^
0_0_31748297_19098.cpp:21:29: error: return-statement with no value, in function returning 'int' [-fpermissive]
                             return;
                             ^