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Packet Layout Using Union with Struct

Code

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

typedef union {
    struct {
        uint8_t start;
        uint8_t command;
        uint16_t data;
        uint8_t crc;
        uint8_t end;
    } fields;
    uint8_t raw[6];
} Packet;

// Fill struct fields and print raw bytes
void build_and_print_packet(uint8_t s, uint8_t c, uint16_t d, uint8_t crc, uint8_t e) {
    // Your logic here
    Packet p1;
    p1.fields.start=s;
    p1.fields.command=c;
    p1.fields.data=d;
    p1.fields.crc=crc;
    p1.fields.end=e;
    for(int i=0;i<6;i++){
        printf("%d ",p1.raw[i]);
    }
}

int main() {
    uint8_t s, c, crc, e;
    uint16_t d;
    scanf("%hhu %hhu %hu %hhu %hhu", &s, &c, &d, &crc, &e);
    build_and_print_packet(s, c, d, crc, e);
    return 0;
}

Solving Approach

 

 

 

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Input

165 1 4660 119 90

Expected Output

165 1 52 18 119 90