Little Endian to Big Endian

Code

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

uint32_t convert_endian(uint32_t value) {
    return ((value >> 24) & 0x000000FF) |   
           ((value >> 8)  & 0x0000FF00) |   
           ((value << 8)  & 0x00FF0000) |   
           ((value << 24) & 0xFF000000);
}

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

Solving Approach