Extract and Modify Field in a 32-bit Register

Code

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

uint32_t update_register(uint32_t reg) {
    // Your logic here
    uint32_t mask = ((1<<5)-1)<<10;
    uint32_t res = (reg & mask)>>10;
    if(res<31){
        res+=1;
}
reg &= ~mask;
reg|= ((res & ((1<<5)-1))<<10);
return reg;

    //return 0;
}

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

Solving Approach

 

 

 

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Input

15360

Expected Output

16384