Rotate Right in a 32-bit Register

Code

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

uint32_t rotate_right(uint32_t reg, uint8_t n) {
    int ex;
    while(n){
    ex = reg & 0x00000001;
    reg = reg >> 1;
    if(ex) reg = reg | 0x80000000;
    else reg |= 0x00;
    n--;
    }
    return reg;

}

int main() {
    uint32_t reg;
    uint8_t n;
    scanf("%u %hhu", &reg, &n);
    printf("%u", rotate_right(reg, n));
    return 0;
}

Solving Approach