如何将相同的变量添加到自身？

Question

我正在尝试在 C 中为其自身添加一个变量。我必须解决的问题要求我询问用户 X 发生在 Y 上的次数。简单的例子：每次有人喝果汁（x），我需要反复添加果汁量（y）。到目前为止，这是我的程序。据我所知，我尝试做的所有事情都按预期工作，除了最后一段代码我需要弄清楚哪些代码需要在 "if" 语句之前。预先感谢您的协助。

#include <stdio.h>
int main(){
int a=1;
int b=1;
int i;
float dollars;
float size;
float price;//per ounceprice
float wieght;
int drinks;//times roommate took some juice
int c=0;
int sips;
int total;
int totalowed;
int loopCounter;
int sipstotal;
//.06 per ounce
float juiceTaken;
float juiceTakenCost;
float juiceTakenTotal;
float costperounce=.06;

while(a=b){
    printf("What is the weight (in oz.) of the original container of OJ?\n\n");
    scanf("%f", &wieght);

    printf("What is the cost of the original container of OJ in dollars?\n\n");
    scanf("%f", &dollars);
    price=dollars/wieght;
    printf("%f\n\n", price);

    printf("How many times did your roomate take your juice?\n\n");
    scanf("%d", &drinks);


        for(loopCounter = 0; loopCounter < drinks; loopCounter++){//repeat next line until loop equals amount of times roomate took juice
        printf("How much juice did your roommate take this time?\n\n");
        scanf("%d", &juiceTaken);
            if(juiceTakenTotal>=10)
            printf("Your roomate owes you $%.2f\n", juiceTakenTotal);



}
}

return 0;
}

Answer 1

我相信这就是您要找的：

    scanf("%d", &juiceTaken);
    juiceTakenTotal = juiceTakenTotal + juiceTaken;
            if(juiceTakenTotal>=10)
            price = juiceTakenTotal * price //calculating price
            printf("Your roomate owes you $%.2f\n", juiceTakenTotal);

在这里，您要将啜饮的次数添加到饮饮的总数中。

Answer 2

您的代码存在的问题是您从未在代码中将榨汁量添加到总量中。因此，就在最后一个 if 语句之前，您需要添加该行。它看起来像：

scanf("%d", &juiceTaken);
juiceTakenTotal = juiceTakenTotal + juiceTaken;
        if(juiceTakenTotal>=10)
        printf("Your roomate owes you $%.2f\n", juiceTakenTotal);

这将解决您当前的问题。

Answer 3

这是正确的最终代码。感谢您所有的帮助！到处都是天才！

#include <stdio.h>
int main(){
int a=1;
int b=1;
float dollars;
float price;//per ounceprice
float wieght;
int drinks;//times roommate took some juice
int loopCounter;
float juiceTaken;
float juiceTakenCost;
float juiceTakenTotal;

while(a=b){
    printf("What is the weight (in oz.) of the original container of OJ?\n\n");
    scanf("%f", &wieght);

    printf("What is the cost of the original container of OJ in dollars?\n\n");
    scanf("%f", &dollars);
    price=dollars/wieght;
    printf("%f\n\n", price);

    printf("How many times did your roomate take your juice?\n\n");
    scanf("%d", &drinks);
    //6 cents per ounce of juice 
    //Insert 2nd loop condition - for loop
        for(loopCounter = 0; loopCounter < drinks; loopCounter++){//repeat next line until loop equals amount of times roomate took juice
        printf("How much juice did your roommate take this time?\n\n");
        scanf("%f", &juiceTaken);
        juiceTakenTotal=juiceTakenTotal + juiceTaken;
        juiceTakenCost=juiceTakenTotal*price;
            if(juiceTakenCost>=10)
            printf("Your roomate owes you $%.2f\n", juiceTakenCost);
            }
    }
return 0;
}

如何将相同的变量添加到自身？

How do I add the same variable to itself?

c

variables

addition