[Lập trình C] Bài tập lập trình C 2

#include <stdio.h>
#include <string.h>

// Khai bao struct motobike_st
typedef struct {
	char name[20];
	char manufacturer[10];
	char madein[12];
	long int price;
} motorbike_st;

void inputData(motorbike_st arr[3]) {
	int i;
	for(i = 0; i < 3; i++) {
		printf("\nEnter data of motorbike %d:\n", i + 1);
		printf("+ Name: ");
		gets(arr[i].name);
		printf("+ Manufacturer: ");
		gets(arr[i].manufacturer);
		printf("+ Made in: ");
		gets(arr[i].madein);
		printf("+ Price: ");
		scanf("%ld", &arr[i].price);
		fflush(stdin);
	}
}

void displayRow(motorbike_st arr[3], int index) {
	printf("%03d||", index + 1);
	printf("%-20s||", arr[index].name);
	printf("%-14s||", arr[index].manufacturer);
	printf("%-10s||", arr[index].madein);
	printf("%-10ld||\n", arr[index].price);
}

void sortDisplay(motorbike_st arr[3]) {
	// Sort z-a
	int i, j;
	for (i = 0; i < 2; i++) {
		for (j = i + 1; j < 3; j++) {
			if(strcmp(arr[i].manufacturer, arr[j].manufacturer) < 0) {
				motorbike_st temp = arr[i];
				arr[i] = arr[j];
				arr[j] = temp;
			}
		}
	}

	// Print header
	printf("\n");
	printf("%-3s||", "No");
	printf("%-20s||", "Name");
	printf("%-14s||", "Manufacturer");
	printf("%-10s||", "Made In");
	printf("%-10s||", "Price");
	printf("\n");

	// Print content
	for(i = 0; i < 3; i++) {
		displayRow(arr, i);
	}
}

void searchDisplay(motorbike_st arr[3]) {
	// Nhap tu ban phim
	char manufacturer[10];
	printf("\nEnter manufacturer for search : ");
	gets(manufacturer);
	printf("\n");

	// Tim kiem
	int i = 0, count = 0;
	for (i = 0; i < 3; i++) {
		if (strcmp(arr[i].manufacturer, manufacturer) == 0) {
			displayRow(arr, i);
			count++;
		}
	}
	if (count == 0) {
		printf("\nThere are no motorbike of this manufacturer\n");
	}
}

void saveToFile(motorbike_st *p) {
	FILE *fp = fopen("motorbike.txt", "w");
	
	int i;
	for (i = 0; i < 3; i++) {
		fprintf(fp, "%s %s\n", (p+i)->name, (p+i)->manufacturer);
	}
	
	fclose(fp);
}

int main() {
	// Khai bao mang struct motobike_st gom 3 phan tu
	motorbike_st motorbikeList[3];
	int entry;

	while(1) {
		// Menu chuong trinh
		printf("\n");
		printf("1. Input data of motorbike \n");
		printf("2. Sort, display details information and statistic of all motorbikes \n");
		printf("3. Find the motorbike of manufacturer \n");
		printf("4. Save to text file motorbike.txt \n");
		printf("5. Exit \n");

		// Nhap 1 so tuong ung voi menu:
		printf("\nEnter a number from 1 to 5: ");
		while(1) {
			if(!scanf("%d", &entry) || entry < 1 || entry > 5) {
				fflush(stdin);
				printf("Enter a number from 1 to 5: ");
			} else {
				fflush(stdin);
				break;
			}
		}

		// Xu ly lua chon
		if (entry == 1) {
			inputData(motorbikeList);
		} else if (entry == 2) {
			sortDisplay(motorbikeList);
		} else if (entry == 3) {
			searchDisplay(motorbikeList);
		} else if (entry == 4) {
			saveToFile(motorbikeList);
		} else {
			break;
		}
	}
	
	return 0;
}