程序代码：

#include<stdio.h>
int main()
{
    unsigned int MyStrlen(char*p)
    unsigned char a;
    unsigned int b;
    scanf("%s",&a);
    b=MyStrlen(char*a);
    printf("b=%d\n",b);
    return 0;
}
unsigned int MyStrlen(char*p)
{
    unsigned int len;
    len=0;
    for(;*p!='\0';p++)
    {
        len++;
    }
    return(len);
}