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Macro-Based Register Config Helper

Code

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

#define ENABLE  reg |=(enable<<0)
#define MODE reg |= (mode<<1)
#define SPEED reg|= (speed<<3)


uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    uint16_t reg = 0;
    
    ENABLE;
    MODE;
    SPEED;
    return reg;
}

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