How to check if string consist of numeric or alphabet in C

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I need some help in Identifying the string. I have incoming string like this

*H1999999#

it can vary from

*H1000000#~*H1999999#

sometimes it is

*H1FINE# or *H1MED#

or any other text in between.Now what I have already done is I have parsed the numeric string and copied the integer value to a buffer. Here is the code for that.

 char H1subbuff[10];
 char head1[4];
 char Initial[2];

 char *ptr;

 memcpy(Initial, &rec[0], 1 );
 Initial[1] = '\0';

 memcpy(head1, &rec[0], 3 );
 head1[3] = '\0';



 if ((strcmp(head1,"*H1") == 0) && (rec[9] == '#'))
  {
     memcpy(H1subbuff, &rec[3], 6 );
     H1subbuff[6] = '\0';

     H1Val = strtol(H1subbuff, &ptr, 10);

     //Display H1VAL
}

Now my query is how can check if the String consist of Number or Alphabet.All I need to check if the Portion between *H1 and # is numeric or Alphabet, if it is a numeric I can use

strtol()

to copy the int value into an buffer. How can I copy the alphabet or text into an buffer?

Note :- The above two string doesn't have same string length.

What I have tried:

I have tried to copy numeric values to a buffer.

Posted 4-Aug-16 6:31am

Member 12670328

Updated 4-Aug-16 6:49am

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Richard MacCutchan · Answer 1 · 2016-08-04T06:49:00

Solution 1

Use a pointer to skip the prefix alphabetic characters, then use strtol[^] to convert the number to a long value. The endptr variable will then point to the first non-numeric character, allowing you to parse further. Something like:

C++

char* strData = "*H1999999#";
char* strNum = strData + 2;
char* strEnd = NULL;
long lValue = strtol(strNum, &strEnd, 10);
// strEnd will now point to the # character.

Posted 4-Aug-16 6:49am

Richard MacCutchan

Comments

Member 12670328 4-Aug-16 12:59pm

How can check if string consist of numeric value or alpahabet?

Richard MacCutchan 4-Aug-16 13:02pm

use one of the isXXX functions as described at https://msdn.microsoft.com/en-us/library/4yc6feha.aspx.

CPallini 5-Aug-16 3:03am

5.