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Macro-Based Register Config Helper

Code

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

// Define macros here
#define set_enable(x) (((x)&0x1)<< 0) 
#define set_mode(x) (((x)&0x3)<< 1)
#define set_speed(x) (((x)&0x7)<< 3)


uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields

uint16_t res;

res|=set_enable(enable);
res|=set_mode(mode);
res|=set_speed(speed);

return res;
}
int main() {
    uint8_t enable, mode, speed;
    scanf("%hhu %hhu %hhu", &enable, &mode, &speed);

    uint16_t reg = build_register(enable, mode, speed);
    printf("%u", reg);
    return 0;
}

Solving Approach

 

 

 

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Input

1 2 4

Expected Output

37