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 field = (reg >> 10) & 0b11111;
    field += 1 ? field < 0x1f : 0 ;
    return reg = (reg & ~(((1U << 4) - 1) << 10)) | (field << 10) ;
}

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

Solving Approach