in C++

yang hendak dibeli dan memaparkan jumlah harga. Program ini harus terus berjalan melainkan ia menerima masukan negatif daripada pengguna. A weapon shop sells arrow for $3 each. Currently, there is an ongoing "buy 7 free 1" promotion, where buyers can get 1 free arrow for every 7 arrows purchased. Write a program 7 that prompts the user to input the number of arrows to be purchased and outputs the total price. The program should keep running unless it receives a negative input from the user. How many arrow do you wish to buys 10 price for 10 arrows - 27 How many arrows do you wish to buy: 20 Price for 20 arrows - 54 How many arrow do you wish to buys -4 process returned (BxD) execution time 16.366 3 Press any key to continue. Rajah S2b Contoh keluaran / Figure S2b: Sample output