What is the string search function in C language?

The library also provides several string search functions, as follows-

char *strchr (const char *string, intc);	#Find the first occurrence of character c in the string.
char "strrchr (const char "string, intc);	Find the last occurrence in the string character c.
char *strpbrk (const char *s1,const char *s2);	Returns a pointer pointing to A null pointer is returned on the first occurrence of any character in string s2 in string s1, or if the character in s2 does not exist in s1.
size_t strspn (const char *s1, const char *s2);	Return the beginning of s1 to match s2 number of characters.
size_t strcspn (const char *51, const char *s2);	Return the beginning of s1 Does not match the number of characters in s2.
char *strtok(c​​har *s1,const char *s2);	Disconnect pointer The string to converts si into a sequence of tokens, each token separated by one or more characters from the string pointed to by s2.
char * strtok_r(char *s1,const char *s2, char	has the same function as strtok() , except **lasts); The pointer to the string placeholder must be provided by the caller.

strchr () and strrchr () are the simplest to use.

Example 1

The following is the C program of String search function-

Real-time demonstration

#include <string.h>
#include <stdio.h>
void main(){
   char *str1 = "Hello";
   char *ans;
   ans = strchr (str1,&#39;l&#39;);
   printf("%s</p><p>", ans);
}

Output

When the above program is executed, the following results are produced -

llo

After executing this operation, ans points to location str1 2.

strpbrk () is a more general function that searches for the first occurrence of any group

Example 2

Following is the C program using strpbrk () function -

Live Demo

#include <string.h>
#include <stdio.h>
void main(){
   char *str1 = "Hello";
   char *ans;
   ans = strpbrk (str1,"aeiou");
   printf("%s</p><p>",ans);
}

Output

When the above program is executed, the following results are produced -

ello

Here, ans points to position str1 1, which is the position of the first e.

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