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 ret = 0;
    for (int i = 0; i < 32; i += 8) {
        ret <<= 8;
        ret |= ((value >> i) & 0xff);
    }

    return ret;
}

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

Solving Approach
 

Solution is more intuitive