Little Endian to Big Endian

Code

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

uint32_t convert_endian(uint32_t value) {
    char *cptr = (char*)&value;
    for(int i=0;i<2;i++){
        char temp = cptr[i];
        cptr[i] = cptr[4-1-i];
        cptr[4-i-1] = temp;
    }
    return value;
}

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

Solving Approach