C语言编程，任意输入一个正整数，倒序输出各位数字，并判断其是几位数。

#include int main(int argc, char **argv){ char num[64]; scanf("%s",num); int length=0; while(num[length]!='\0') length++; printf("5498是倒序各位数字是："); int counter=length-1; while(counter>=0)