fix5

du3/program.c

@@ -72,7 +72,7 @@ int main(){
             if (input[0]=='-') result=a-b;
             if (input[0]=='*') result=a*b;
             if (input[0]=='/'){
-                if (b==0) {printf("division by zero");return 1;}
+                if (b==0) {printf("division by zero");return 0;}
                 result=a/b;
             }
             push(&mystack, result);