c - 利率计划

Question

已关闭。这个问题是 not reproducible or was caused by typos 。目前不接受答案。

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这个问题是由拼写错误或无法再重现的问题引起的。虽然类似的问题可能是 on-topic在这里，这个问题的解决方式不太可能帮助 future 的读者。

已关闭 7 年前。

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我刚刚开始学习 C。所以为了练习，我决定编写一个利率计算器，但由于某种原因，我的计算结果总是为 0，我无法弄清楚。如果可以的话请看一下。

#include <stdio.h>


main()
{


int time;
float principle, rate, total;

printf("What is your starting amount? ");
scanf(" %f", &principle);
printf("What is your interest rate? ");
scanf(" %f", &rate);
printf("How long do you want to save? ");
scanf(" %d", &time);

total = principle * rate * time;
printf("You will have earned an interest amount of $%d", total);
return 0;
}

Answer 1

printf("You will have earned an interest amount of $%d", total);

由于 total 是 float ，因此 %d 应为 %f。另外，在每行末尾添加一个新行也是一个很好的做法。

printf("You will have earned an interest amount of $%f\n", total);