Little Endian to Big Endian

Code

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

uint32_t convert_endian(uint32_t value) {
    // Write logic to swap bytes
    uint32_t reg = 0;
    uint32_t mask = 0;
    // uint4_t cn = 0x01111;
    // printf("BD: %x\n", value);
    for(int i = 0; i < 4; i++){
        mask = (value & 0xFF); 
        // printf("%d\n", mask);
        reg |= mask;
        if(i == 3) continue;
        reg <<= 8;
        value >>= 8;
        // printf("%u %u %u\n",mask ,value, reg);
    }
    
    return reg;
}

int main() {
    uint32_t val;
    scanf("%u", &val);
    printf("%u", convert_endian(val));
    return 0;
}
// 0001 0010 0011 0100 0101 0110 0111 1000
// Input: 305419896
// Output: 2018915346
// (0x12345678 → 0x78563412)

// Input: 1
// Output: 16777216
// (0x00000001 → 0x01000000)

Solving Approach