Quản lý đồ điện tử - Lập trình C BT1920

#main.c

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

typedef struct spdientu_st {
	char ten[20], ma[25], nhasx[20];
	long int gia;
} spdientu;

void showMenu();
void input(spdientu danhsachsp[3]);
void sort(spdientu danhsachsp[3]);
void display(spdientu danhsachsp[3]);
void statistic(spdientu danhsachsp[3]);
void find(spdientu danhsachsp[3]);
void saveFile(spdientu danhsachsp[3]);

int main(int argc, char *argv[]) {
	spdientu danhsachsp[3];
	
	char c;
	do {
		showMenu();
		fflush(stdin); fflush(stdout);
		scanf("%c", &c);
		
		switch(c) {
			case '1': {
				input(danhsachsp);
				break;
			}
			case '2': {
				sort(danhsachsp);
				display(danhsachsp);
				statistic(danhsachsp);
				break;
			}
			case '3': {
				find(danhsachsp);
				break;
			}
			case '4': {
				saveFile(danhsachsp);
				break;
			}
			case '5': {
				printf("\nThoat");
				break;
			}
			default: {
				printf("\nNhap sai!!!");
				break;
			}
		}
	} while(c != '5');
	
	return 0;
}

void showMenu() {
	printf("\n1. Nhap");
	printf("\n2. Sap xep & hien thi");
	printf("\n3. Tim kiem");
	printf("\n4. Luu file");
	printf("\n5. Thoat");
	printf("\nChon: ");
}

void input(spdientu danhsachsp[3]) {
	int i;
	for(i=0;i<3;i++) {
		printf("\nNhap san pham %d:", i + 1);
		printf("\nTen: ");
		fflush(stdin); fflush(stdout);
		gets(danhsachsp[i].ten);
		printf("\nMa: ");
		fflush(stdin); fflush(stdout);
		gets(danhsachsp[i].ma);
		printf("\nNha san xuat: ");
		fflush(stdin); fflush(stdout);
		gets(danhsachsp[i].nhasx);
		printf("\nGia: ");
		fflush(stdin); fflush(stdout);
		scanf("%d", &danhsachsp[i].gia);
	}
}

void sort(spdientu danhsachsp[3]) {
	int i, j, cmp;
	spdientu tmp;
	
	for(i=0;i<2;i++) {
		for(j=i+1;j<3;j++) {
			cmp = strcmp(danhsachsp[i].nhasx, danhsachsp[j].nhasx);
			if(cmp < 0) {
				tmp = danhsachsp[i];
				danhsachsp[i] = danhsachsp[j];
				danhsachsp[j] = tmp;
			}
		}
	}
	//Ends
}

void display(spdientu danhsachsp[3]) {
	int i;
	printf("\nSTT | Ten | Ma | Nha San Xuat | Gia");
	for(i=0;i<3;i++) {
		printf("\n%d | %s | %s | %s | %d", i + 1, danhsachsp[i].ten, danhsachsp[i].ma, danhsachsp[i].nhasx, danhsachsp[i].gia);
	}
}

void statistic(spdientu danhsachsp[3]) {
	int i, j, cmp;
	//B1. Khai bao mang countList[3] -> luu so phan tu trong mang
	int countList[3];
	
	for(i=0;i<3;i++) {
		countList[i] = 1;
	}
	
	//B2. Thuc hien qua trinh don phan tu
	for(i=0;i<2;i++) {
		if(countList[i] == 0) continue;
		for(j=i+1;j<3;j++) {
			if(countList[j] == 0) continue;
			
			cmp = strcmp(danhsachsp[i].nhasx, danhsachsp[j].nhasx);
			if(cmp == 0) {
				countList[i]++;
				countList[j]--;
			}
		}
	}
	
	//B3. Hien thi ket qua
	for(i=0;i<3;i++) {
		if(countList[i] == 0) continue;
		printf("\nNha san xuat %s co %d san pham", danhsachsp[i].nhasx, countList[i]);
	}
}

void find(spdientu danhsachsp[3]) {
	char s[25];
	printf("\nNhap nha san xuat can tim: ");
	fflush(stdin); fflush(stdout);
	gets(s);
	
	int isFind = 0, i, cmp;
	for(i=0;i<3;i++) {
		cmp = strcmp(danhsachsp[i].nhasx, s);
		if(cmp == 0) {
			if(isFind == 0) {
				printf("\nSTT | Ten | Ma | Nha San Xuat | Gia");
			}
			printf("\n%d | %s | %s | %s | %d", i + 1, danhsachsp[i].ten, danhsachsp[i].ma, danhsachsp[i].nhasx, danhsachsp[i].gia);
			
			isFind = 1;
		}
	}
	
	if(isFind == 0) {
		printf("\nKhong tim thay san pham cua nha san xuat nay");
	}
}

void saveFile(spdientu danhsachsp[3]) {
	FILE *fp;
	
	fp = fopen("spdientu.dat", "wb");
	
	if(ferror(fp)) {
		printf("\nFile is error");
	} else {
		fwrite(danhsachsp, sizeof(spdientu), 3, fp);
	}
	
	fclose(fp);
}