Fix a bug

03/3/3.c

@@ -9,24 +9,22 @@ int number(int num){
 	    if (a == 0) 
 	    	first = 0;
 			printf("3");
-	    if (b == 0)
+	    if (b == 0){
 		    if (first) {
 		        printf("5");
 		        first = 0;
 		    }
 		    else
 		    	printf(",5");
-		// 防止编译器编译时输出警告
-		else a=a;
-		if (c == 0)
+		    }
+		if (c == 0){
 			if (first) {
 				printf("7");
 				first = 0;
 			}
 			else
 				printf(",7");
-		// 防止编译器编译时输出警告
-		else a=a;
+		}
 	}
 	else {
 	    printf("Can not be divisible by 3,5,7");