Little Endian to Big Endian

Code

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



union Register {
    uint32_t value;
    uint8_t reg[4];
};
uint32_t convert_endian(uint32_t value) {
    Register var;
    var.value = value;
    for(int i=0,j=3;i<j;i++,j--){
        int temp = var.reg[i];
        var.reg[i] = var.reg[j];
        var.reg[j] = temp;
    }
    return var.value;
}

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

Solving Approach