114. Little Endian to Big Endian

#include <stdio.h>
#include <stdint.h>

uint32_t convert_endian(uint32_t value) {
    // Write logic to swap bytes
    uint32_t mask1 = 0xff;
    uint32_t mask2 = 0xff000000;
    mask1 = mask1 & value;
    mask2 = mask2 & value;
    value = value & 0xffff00;
    value = value | (mask1<<24) | (mask2>>24);

    mask1 = 0xff00;
    mask2 = 0xff0000;
    mask1 = mask1 & value;
    mask2 = mask2 & value;
    value = value & 0xff0000ff;
    value = value | (mask1<<8) | (mask2>>8);
    return value;
}

int main() {
    uint32_t val;
    scanf("%u", &val);
    printf("%u", convert_endian(val));
    return 0;
}