Question

How search within the first N bytes of the block of memory with memchr() function in C

Answer 1

#include <stdio.h>
#include <string.h>

int main(void)
{
	char *p;
	char s[] = "C Programming IDE";
	
	p = (char *) memchr(s, 'm', strlen(s));
	if (p != NULL)
		printf("%s\n", p);
	else
		printf("'m' not found\n");
	
	return 0;
}

 
/*
   
run:
   
mming IDE

*/

 

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Answer 2

#include <stdio.h>
#include <string.h>

int main(void)
{
	char *p;
	char s[] = "C Programming IDE";
	
	p = (char *) memchr(s, 'm', 5);
	if (p != NULL)
		printf("%s\n", p);
	else
		printf("'m' not found\n");
	
	return 0;
}

 
/*
   
run:
   
'm' not found

*/

 

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Answer 3

#include <stdio.h>
#include <string.h>

int main(void)
{
	char *p;
	char s[] = "C Programming IDE";
	
	p = (char *) memchr(s, 'm', strlen(s));
	if (p != NULL)
		printf("Found at position : %ld\n", p - s);
	else
		printf("'m' not found\n");
	
	return 0;
}

 
/*
   
run:
   
Found at position : 8

*/

 

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