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
    int mask = (1u << 5) - 1;
    uint32_t result = (reg >> 10) & mask;
    if (result < 31)
    {
        result += 1;
        // clear that bit 
        reg &= ~(mask << 10);
        // update that bit now 
        reg |= (result & mask) << 10;

    }
    

    return reg;
}

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