Extract and Modify Field in a 32-bit Register

Code

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

uint32_t update_register(uint32_t reg) {

    uint32_t ex;
    ex = reg & 0x00007C00;

    uint32_t ans;

    ans = ex >> 10;
   // printf("%d\n",ans);
    if(ans < 31) ans++;
    //previous value make it zero 
    reg = reg & (~(0x00007C00));
    ans = ans << 10;

    reg |= ans;
    return reg;
}

int main() {
    uint32_t reg;
    scanf("%u", &reg);
    uint32_t updated = update_register(reg);
    printf("%u", updated);
    return 0;
}

Solving Approach