Little Endian to Big Endian

Code

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

uint32_t convert_endian(uint32_t value) {
    return (value & 0xffu) << 24 |
           (value & (0xffu << 24 )) >> 24 |
           (value & (0xffu << 16 )) >> 8 |
           (value & (0xffu << 8)) << 8;
}

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

Solving Approach