26. Extract and Modify Field in a 32-bit Register

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

uint32_t update_register(uint32_t reg) {
uint16_t r=reg&(0x7C00);
    r=r>>10;
        if(r<0x1F){
                r+=0x01;
                        reg=reg&((~0u)<<15|(1<<10)-1);
                                reg=reg|(r<<10);
                                    }

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