如何将浮点数存储在数组中以备后用？ [英] How to store floats in array to be used later?

问题描述

程序用户如何将信息存储在数组中（例如浮点数），并可以在以后的程序中计算平均值？我正在尝试制作一个程序来计算某人的平均成绩。

how can a user of a program store info in arrays such as a float number and can be calculated for an average later in the program? im trying to make a program to calculate someones grade point average.

推荐答案

从Java过渡到C，这是最大的概念跳跃

Transitting from java to C, the biggest "concept jump" you have to make is Pointers.

尝试以这种方式分配浮动对象：

Try allocating your floats this way:

float *float_array = malloc(amount_of_elemts_in_array * sizeof(float))

然后可以遍历使用

float_array[index]

具有此指针将使您可以通过引用将 float_array 传入和传出函数，这非常方便，因为您不想重新创建

Having this pointer will enable you to pass float_array in and out of functions by reference which is a great convenience since you don't want to recreate instances over every function call.

使用以下方法将 float_array 传递给函数：

Pass float_array into functions using:

Function Declaration: void function_that_uses_float_array(float *placeholder);
Function Call: function_that_uses_float_array(placeholder);

将 float_array 传递给以下函数： / p>

Pass float_array out of functions using:

Return statement: return a_float_pointer;
One level up the stack: float_array = function_that_returns_a_float_pointer();

数组是通过引用自动传递的。

Arrays are automatically passed by reference.

希望这可以帮助您指出正确的方向。

Hope this helps point you in the right direction.

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