C memcpy() Function

C memcpy() Function

The memcpy() function copies a block of memory from a location to another.

This function copies the data directly from source to destination. So, memcpy() is faster approach than memmove().

This function overlaps the source. So, memmove() is not as safe as memmove().

Example

C Compiler
#include <stdio.h> #include <string.h> int main() { char dest[] = "abcde"; char src[] = "123"; memcpy(dest, src, 3); printf("New dest = %s", dest); return 0; }

Syntax

void *memcpy(void *dest, const void *src, size_t n)

Parameter Values

ValueTypeExplanation
destRequiredDestination array where the content is to be copied.
srcRequiredSource of data to be copied.
nRequiredNumber of bytes to be copied.

Return Value

ValueExplanation
AddressReturns a pointer to the destination, which is dest array.

More Examples

Example

C Compiler
#include <stdio.h> #include <string.h> int main() { char str1[] = "abcde"; memcpy(&str1[2], &str1[0], 3); printf("New str1 = %s", str1); return 0; }

Example

C Compiler
#include <stdio.h> #include <string.h> int main() { char str1[] = "abcde"; char str2[] = "abcde"; memcpy(&str1[2], &str1[0], 3); memmove(&str2[2], &str2[0], 3); printf("memcpy's str1 = %s\n", str1); printf("memmove's str2 = %s", str2); return 0; }

Join Our Channel

Join our telegram channel to get an instant update on depreciation and new features on HTML, CSS, JavaScript, jQuery, Node.js, PHP and Python.

This channel is primarily useful for Full Stack Web Developer.

Share this Page

Meet the Author