View Compilation Error

0_0_17730228_10270.cpp: In function 'void get_sg(int)':
0_0_17730228_10270.cpp:45:28: error: return-statement with a value, in function returning 'void' [-fpermissive]
         if(!vis[i]) return i;
                            ^
0_0_17730228_10270.cpp:46:12: error: return-statement with a value, in function returning 'void' [-fpermissive]
     return 0;
            ^
0_0_17730228_10270.cpp: In function 'int main()':
0_0_17730228_10270.cpp:53:14: error: void value not ignored as it ought to be
         sg[i]=get_sg(i);
              ^