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Standard C Libraries
memcpy
Description:
Include:
Prototype:
Copies characters from one buffer to another.
<string.h>
void *memcpy(void * dst , const void * src , size_t n );
Arguments:
dst
src
n
buffer to copy characters to
buffer to copy characters from
number of characters to copy
Return Value:
Remarks:
Example:
? 2008 Microchip Technology Inc.
Returns dst .
memcpy copies n characters from the source buffer src to the destina-
tion buffer dst . If the buffers overlap, the behavior is undefined.
#include <string.h> /* memcpy */
#include <stdio.h> /* for printf */
int main(void)
{
char buf1[50] = "";
char buf2[50] = "Where is the time?";
char buf3[50] = "Why?";
printf("buf1 : %s\n", buf1);
printf("buf2 : %s\n", buf2);
printf("buf3 : %s\n\n", buf3);
memcpy(buf1, buf2, 6);
printf("buf1 after memcpy of 6 chars of "
"buf2: \n\t%s\n", buf1);
printf("\n");
memcpy(buf1, buf3, 5);
printf("buf1 after memcpy of 5 chars of "
"buf3: \n\t%s\n", buf1);
}
Output:
buf1 :
buf2 : Where is the time?
buf3 : Why?
buf1 after memcpy of 6 chars of buf2:
Where
buf1 after memcpy of 5 chars of buf3:
Why?
DS51456E-page 117
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