给你写了个,运行通过,你看看吧,记得采纳哦O(∩_∩)O~
#include
int main(){
\x09int num,i=0;
\x09printf("please input a numble:");
\x09while(1){
scanf("%d",&num);
if(num0){
num/=10;
i++;
}
break;
}
printf("It's width is %d",i);
}