#include <stdio.h> #include <stdint.h> typedef struct { uint8_t start; uint8_t command; uint16_t data; uint8_t crc; uint8_t end; } Packet; void print_packet_fields(uint8_t *buffer) { // Overlay struct and print values // Packet pack; // pack.start = *(buffer); // pack.command = *(buffer + 1); // pack.data = (*(buffer + 2)) | (*(buffer + 3) << 8); // pack.crc = *(buffer + 4); // pack.end = *(buffer + 5); // printf("Start: %u\n",pack.start); // printf("Command: %u\n",pack.command); // printf("Data: %u\n",pack.data); // printf("CRC: %u\n",pack.crc); // printf("End: %u\n",pack.end); Packet *pkt = (Packet *)buffer; printf("Start: %u\n",pkt->start); printf("Command: %u\n",pkt->command); printf("Data: %u\n",pkt->data); printf("CRC: %u\n",pkt->crc); printf("End: %u\n",pkt->end); } int main() { uint8_t buffer[6]; for (int i = 0; i < 6; i++) { scanf("%hhu", &buffer[i]); } print_packet_fields(buffer); return 0; }
Test Cases
Test Results
Input
165 1 52 18 119 90
Expected Output
Start: 165 Command: 1 Data: 4660 CRC: 119 End: 90