Little Endian to Big Endian

Code

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

typedef union{
    uint32_t result;
    uint8_t arr[4];
}res;


uint32_t convert_endian(uint32_t value) {
    // Write logic to swap bytes
    res r;
    r.result=value;
    for(int i=0;i<2;i++){
        uint8_t temp=r.arr[i];
        r.arr[i]=r.arr[3-i];
        r.arr[3-i]=temp;
    }
    return r.result;
}

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

Solving Approach