Question

How to copy byte array to unsigned long in C

Answer 1

#include <stdio.h>
#include <string.h>

int main()
{
    const char barray[] = {1, 2}; // 0010 0000 0001 = 513
    
    unsigned long ulnum = 0;
    
    // void *memcpy(void *dest, const void * src, size_t n)
    memcpy(&ulnum, barray, sizeof(barray));
    
    printf("%ld", ulnum);
}



/*
run:

513

*/

 

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