总是报错，用指针求字符串长度，求高手指点
用指针求数组s1的长度，这行代码总是报错，实在想不出哪错了，求高手指点
#include <stdio.h>
int main()
{
char s1[100] = "hello";
char s2[100] = "world";
char *P1 = s1;
int len = 0;
while(*p1)
{
p1++;
len++;
}printf("%d",len);
return 0;
}
#include <stdio.h>
int main()
{
char s1[100] = "hello";
char s2[100] = "world";
char *P1 = s1;
int len = 0;
while(*p1)
{
p1++;
len++;
}printf("%d",len);
return 0;
}
