Question

How to implement memset in C

Answer 1

#include <stdio.h>

#define LEN 5

void myMemset(void* str, char ch, size_t n) {
	char* s = (char*)str;

	for (int i = 0; i < n; i++)
		s[i] = ch;
}

int main(void) {
    char arr[LEN] = { 3, 8, 9, 4, 7}; 

    myMemset(arr, 0, LEN); 

    for (int i = 0; i < LEN; i++)
        printf("%3d", arr[i]);

    return 0;
}




/*
run:

  0  0  0  0  0

*/

 

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