C library functions - memcpy ()
C standard library - <string.h>
description
C library functionsvoid * memcpy (void * str1, const void * str2, size_t n) Copies ncharacters from the storage area to the storage areastr2str1.
statement
Here is () statement memcpy function.
void *memcpy(void *str1, const void *str2, size_t n)
parameter
- str1 - point to the destination array for storing the copied contents, type cast to void * pointers.
- str2 - pointing to copy the data source, type cast to void * pointers.
- n - thenumber of bytes to be copied.
return value
This function returns a pointer to the destination store str1 pointer.
Examples
The following example demonstrates the memcpy () function is used.
#include <stdio.h>
#include <string.h>
int main ()
{
const char src[50] = "http://www.w3cschool.cc";
char dest[50];
printf("Before memcpy dest = %s\n", dest);
memcpy(dest, src, strlen(src)+1);
printf("After memcpy dest = %s\n", dest);
return(0);
}
Let's compile and run the above program, which will result in the following:
Before memcpy dest = After memcpy dest = http://www.w3cschool.cc