Learn C, C++ Programming

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• strchr( ) function returns pointer to the first occurrence of the character in a given string. Syntax for strchr( ) function is given below.

char *strchr(const char *str, int character);

……

Example program for strchr() function in C:

• In this program, strchr( ) function is used to locate first occurrence of the character ‘i’ in the string “This is a string for testing”. Character ‘i’ is located at position 3 and pointer is returned at first occurrence of the character ‘i’.

#include <stdio.h>
#include <string.h>
int main ()
{
  char string[55] ="This is a string for testing";
  char *p;
  p = strchr (string,'i');

  printf ("Character i is found at position %dn",p-string+1);
  printf ("First occurrence of character "i" in "%s" is" 
           " "%s"",string, p);

   return 0;
}

Output:

• If you want to find every occurrence of a character in a given string, you can use below C program.

#include <stdio.h>
#include <string.h>
int main ()
{
  char string[55] ="This is a string for testing";
  char *p;
  int k = 1;
  p = strchr (string,'i');
  while (p!=NULL)
  {
    printf ("Character i found at position %dn",p-string+1);
    printf ("Occurrence of character "i" : %d n",k);
    printf ("Occurrence of character "i" in "%s" is "%s" 
            ""n",string, p);
    p=strchr(p+1,'i');
    k++;
  }
  return 0;
}

Output:

Other C String functions:

• String.h header file supports all the string functions in C language. All the string functions are given below.
• Click on each string function name below to display example programs.

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