#include <stdio.h>
#include <string.h>
struct doibong
{
char tendoi[50];
int madoi;
char tenhlv[50];
};
void adddoibong();
void displaydoibong();
int n = 0;
int main()
{
int chon;
do
{
printf("\n1.Quan ly danh sach doi bong.")...
#include<stdio.h>
#include<string.h>
int tong;
struct sanpham
{
char tensanpham[50];
int soluong;
int dongia;
};
struct sanpham sanpham[100];
int main()
{
for (int i = 1; i < 4; i++)
{
printf("nhap ten san pham %d : ", i);
getchar()...