Here we will see how to implement the memcpy() function in C language. The memcpy() function is used to copy a block of data from one location to another. The syntax of memcpy() is as follows -
void * memcpy(void * dest, const void * srd, size_t num);
To make our own memcpy, we have to typecast the given address to char* and then copy the data byte by byte from the source to the destination. Just read the following code to get a better idea.
Example
#include #include void custom_memcpy(void *dest, void *src, size_t n) { int i; //cast src and dest to char* char *src_char = (char *)src; char *dest_char = (char *)dest; for (i=0; i", dest); int arr[] = {10, 20, 30, 40, 50, 60, 70, 80, 90}; int n = sizeof(arr)/sizeof(arr[0]); int dest_arr[n], i; custom_memcpy(dest_arr, arr, sizeof(arr)); printf("The copied array is "); for (i=0; i
Output
The copied string is Hello World The copied array is 10 20 30 40 50 60 70 80 90
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