Question

How to use strcspn() function to scan s1[] for the first occurrence of any character of s2[] in C

Answer 1

#include <stdio.h>
#include <string.h>
 
int main(void)
{
	char s1[] = "f35";
	char s2[] = "121258y";
	
	// found the number 5 from s2[] in s1[2]
	
	/* return the number of characters of s1[] that read before first occurrence 
	 * of the number 5 
	 */
	printf("The first occurrence in s1 is at index %u\n", (int)strcspn(s1, s2));
     
    return 0;
}

 
/* 
run:

The first occurrence in s1 is at index 2
 
*/

 

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