memset Function

Copies the specified character into the destination buffer.

Include

<string.h>

Prototype

void *memset(void *s, int c, size_t n);

Arguments

s

buffer

c

character to put in buffer

n

number of times

Return Value

Returns the buffer with characters written to it.

Remarks

The character c is written to the buffer n times.

Example

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

int main(void)
{
  char buf1[20] = "What time is it?";
  char buf2[20] = "";
  char ch1 = '?', ch2 = 'y';
  char *ptr;
  int res;

  printf("memset(\"%s\", \'%c\',4);\n", buf1, ch1);
  memset(buf1, ch1, 4);
  printf("buf1 after memset: %s\n", buf1);

  printf("\n");
  printf("memset(\"%s\", \'%c\',10);\n", buf2, ch2);
  memset(buf2, ch2, 10);
  printf("buf2 after memset: %s\n", buf2);
}

Example Output

memset("What time is it?", '?',4);
buf1 after memset: ???? time is it?

memset("", 'y',10);
buf2 after memset: yyyyyyyyyy