Cell phone number legality judgment

Cell phone number legality judgment (20 points)

Problem Description:

China's mainland operators of mobile phone number standard format is: Country code + mobile phone number, for example: 8613912345678. Features are as follows:

1, 13 bits in length;

2, with 86 of the country code starts;

3, mobile phone number of each person is a number.

Please implement the function of judging the legality of mobile phone number (note: Candidates do not need to pay attention to the authenticity of mobile phone number, that is, such as 86123123456789 mobile phone number, we also believe that is legal), requirements:

1) If the mobile phone number is valid, return 0;

2) If the phone number is not valid, return 1

3) If the phone number contains non-numeric characters, return 2;

4) If the mobile phone number does not begin with 86, return 3;

"Note" In addition to the success of the case, the above other legal judgment priority reduced. That is to say, if the length is not valid, return 1 directly, do not need to do other legal judgment.

Required implementation functions:

int verifymsisdn (char* inmsisdn)

"Input" char* inmsisdn, which represents the input mobile number string.

"Output" none

The result of the "return" judgment, type int.

Example

Input: inmsisdn = "869123456789"

Output: None

Returns: 1

Input: inmsisdn = "8813912345678"

Output: None

Returns: 3

Input: inmsisdn = "8613912345678"

Output: None

Returns: 0

1#include <stdio.h>2 intVERIFYMSISDN (Char*inmsisdn)3 {4     intlen,i;5     BOOLa[4];6     Const Char*p =inmsisdn;7Len =0;8      for(i=0; I <3; i++)9A[i] =false;Tena[3] =true; One     if(inmsisdn[0] =='8'&& inmsisdn[1] =='6') Aa[3] =false; -p++; -p++; theLen + =2; -      while(*p! =' /') -     { -         if(*p <'0'|| *p >'9') +a[2] =true; -p++; +len++; A     } at     if(Len! = -) -a[1] =true; -     if(!a[1] &&!a[2] &&!a[3]) -a[0] =true; -      for(i=0; I <4; i++) -         if(A[i]) in             returni; - } to intMain () + { -     Chars[ -]; thescanf"%s", s); *printf"%d\n", VERIFYMSISDN (s)); $}

Cell phone number legality judgment