ktltbai19.cpp

#include <stdio.h>

typedef struct{
    char ten[50];
    int soLuong;
    int donGia;
}SanPham;

int main()
{
    int n;
    printf("Nhâp vào số lượng mặt hàng: ");
    scanf("%d",&n);
    SanPham products[n];
    int tong = 0;
    for(int i=0;i<n;i++){
        printf("\nNhap thong tin san pham thu %d\n",i+1);
        printf("Ten San Pham: ");
        gets(products[i].ten);
        printf("So luong: ");
        scanf("%d",&products[i].soLuong);
        printf("Don gia: ");
        scanf("%d",&products[i].donGia);
        tong += products[i].soLuong * products[i].donGia;
    }
    
    printf("Tong tien hang la %d",tong);

    return 0;
}