C / C ++memcpy() function in

This functionmemcpy()Used to copy a storage block from one position to another. One is the source, and the other is a pointer to the destination. This is declared in the 'string.h' header file using C language. It does not check for overflow.

This ismemcpy()C language syntax,

void　*memcpy(void　*dest_str, const void　*src_str, size_t number)

Here,

dest_str-Pointer to the destination array.

src_str-Pointer to the source array.

Number-bytes, copied from source to destination.

This ismemcpy()C language example,

Example

#include <stdio.h>
#include <string.h>
int main () {
　　　char a[] = "Firststring";
　　　const char b[] = "Secondstring";
　　　memcpy(a, b,　5);
　　　printf("New arrays: %s	%s", a, b);
　　　return 0;
}

Output result

New arrays: SeconstringSecondstring

In the above program, two char type arrays are initialized,memcpy()The function copies the source string 'b' to the destination string 'a'.

char a[] = "Firststring";
const char b[] = "Secondstring";
memcpy(a, b,　5);