1

我创建了一个程序，它为用户输入一个输入，然后让他们输入他们想要输入的金额，但是当我打印总和金额时。然而，这是全面恢复相同的价值：即

总计：5.00 食物：5.00 账单：5.00 旅行：5.00 同性恋：5.00

代替：

总计：14.00 食物：2.00 账单：3.00 旅行：4.00 同性恋：5.00

int main(void)
{

float food = 0.00;
float travel = 0.00;
float bills = 0.00;
float fags = 0.00;
float total = 0.00;

float t_food, t_travel, t_bills, t_fags;

char userInput[3];

while(userInput[0] != 'X')
{

    printf("Select option,\nA: Food\nB: Travel\nC: Bills\nD: Fags\nX: Exit\n");
    scanf("%s", userInput);
    if((userInput[0] == 'A') || (userInput[0] =='a'))
    {
        printf("Please enter an amount: ");
        scanf("%f", &food);
        printf("You have entered: %.2f\n", food);
        t_food += food;

    }
    if((userInput[0] == 'B') || (userInput[0] =='b'))
    {
        printf("Please enter an amount: ");
        scanf("%f", &travel);
        printf("You have entered: %.2f\n", travel);
        t_travel += travel;

    }
    if((userInput[0] == 'C') || (userInput[0] =='c'))
    {
        printf("Please enter an amount: ");
        scanf("%f", &bills);
        printf("You have entered: %.2f\n", bills);
        t_bills += bills;

    }
    if((userInput[0] == 'D') || (userInput[0] =='d'))
    {
        printf("Please enter an amount: ");
        scanf("%f", &fags);
        printf("You have entered: %.2f\n", fags);
        t_fags += fags;

    }
    if((userInput[0] =='X') || (userInput[0] =='x'))
    {
        total = t_food + t_fags + t_travel + t_bills;

        printf("Total: %.2f\n", &total);
        printf("Food: %.2f\n", &t_food);
        printf("Travel: %.2f\n", &t_travel);
        printf("Bills: %.2f\n", &t_bills);
        printf("Fags: %.2f\n", &t_fags);
        break;
    }
}
return 0;

}

有任何想法吗？

4

5 回答 5

7

改变

    printf("Total: %.2f\n", &total);
    printf("Food: %.2f\n", &t_food);
    printf("Travel: %.2f\n", &t_travel);
    printf("Bills: %.2f\n", &t_bills);
    printf("Fags: %.2f\n", &t_fags);

至

    printf("Total: %.2f\n", total);
    printf("Food: %.2f\n", t_food);
    printf("Travel: %.2f\n", t_travel);
    printf("Bills: %.2f\n", t_bills);
    printf("Fags: %.2f\n", t_fags);

听编译器说，

warning: format ‘%f’ expects argument of type ‘double’, but argument 2 has type ‘float *’ [-Wformat]
于 2013-03-16T11:33:15.690 回答
1

删除&in printf，这意味着您传递值的位置，而不是值本身。

于 2013-03-16T11:32:50.547 回答
1

您应该使用 中的值printf，而不是地址。

于 2013-03-16T11:33:22.083 回答
0

如果您在最后一个 if 代码块中删除& ，一切都会正常工作

于 2013-03-16T11:52:35.320 回答
0

除了先前关于 printf 的答案之外，您还需要初始化包含总值的浮点变量。就像是：

float t_food=0, t_travel=0, t_bills=0, t_fags=0;
...
printf("Total: %.2f\n", total);
printf("Food: %.2f\n", t_food);
printf("Travel: %.2f\n", t_travel);
printf("Bills: %.2f\n", t_bills);
printf("Fags: %.2f\n", t_fags);
于 2013-03-16T13:29:16.837 回答