while循環問題

Question

/*Taking input from user to calculate the cost of a travel plan                                            
using the number of travelers/ number of stops/ cost of each stop                                           
giving both the half cost of a trip and its full price*/ 

int calculate(int total); 

#include <stdio.h> 
int main(void) 
{ 
    float customer, stops, response, cost, i, stop, total, halfcost, totaltrip; 
    i=0; 
    printf("Welcome to Airline express.\n"); 

    printf("Would you like to calculate the cost of a trip?"); 

    scanf("%f", &response); 
    while (response != 0) 
    { 
     printf("Please enter how many customer will be traveling. Children under 12 are counted as .5:"); 
     scanf("%f", &customer); 
     if (customer < 0) 
      customer = 3; 

     printf("Please enter how many stops there are:"); 
     scanf("%f", &stop); 

     while (i<stop) 
     { 
      printf("Please enter cost of the next stop:"); 
      scanf("%f", &cost); 
      if (cost < 0) 
       cost = 100; 
      total +=cost; 
      i++; 
     } 

     halfcost = calculate(total); 
     printf("Half cost is: %f", halfcost); 


     totaltrip = total * customer; 
     printf("Total cost for trip is: %f\n", totaltrip); 

     printf("Would you like to calculate another trip?"); 
     scanf("%f", &response); 
    } 
    return 0; 
} 

int calculate(int total) 
{ 
    return total/2; 
} 

我遇到了輸入問題，我試圖讓循環運行，因爲用戶請求另一個計算。但是，當它再次運行另一個測試時，它會保持先前測試的輸入是否有辦法將變量重置爲0？ 我曾嘗試分配循環內部和外部的所有變量，但我有點不知道該從哪裏去。

Answer 1

將變量的聲明移到循環中。

while (response != 0) 
{ 
    float customer = 0, stops = 0, response = 0, cost = 0, i = 0, stop = 0, total = 0, halfcost = 0, totaltrip = 0; 
    ... 
}