Little Endian to Big Endian

Code

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

uint32_t convert_endian(uint32_t value) {
    uint32_t res = 0; 
    res  = value >> 24; 
    res |= (value << 24) & 0xFF000000; 
    res |= (value >> 8) & 0x0000FF00;
    res |= (value << 8) & 0x00FF0000;
    return res;
}

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

Solving Approach