#include<stdio.h>
#include<math.h>
void main(void)
{
long long n;int ys,i,jg;
printf("输入一个八进制数：");
scanf("%lld",&n);
while(n!=0)
{                                                     大家帮我看看这个哪有问题
ys = n%10;
n = n/10;
jg += ys*pow(8,i);
i++;
}
printf("十进制数为:%d",jg);
   
}