简单的手机号判断

#include <stdio.h>

int main()
{
   int a = 0;
   a = judged("8613775669854");
   printf("%d\n",a);
}

int judged(char *str)
{
   if(strlen(str)!=13 )   //手机号不为13
   {
      return 1;
   }
   int i = 0;
   for(i = 0; i<13; i++)  
   {
       if(str[i]<'0'|| str[i]>'9')   //手机号中有非法字符
       {
           return 2;
       }
   }
   if(str[0]!='8'|| str[1]!='6')   //不以86开头
   {
       return 3;
   }
   return 0;  //正常
}

转载于:https://www.cnblogs.com/qingjoin/archive/2012/10/23/2735160.html