What does i++ mean in c++-C++-php.cn

What does i++ mean in c++

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Release： 2024-05-01 17:06:43

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In C, i is the postfix increment operator, which increases the value of variable i by 1. Its working principle is to first take out the current value of the variable and then increment it by 1. It does not return a new value, so i needs to be used to print the new value. Examples include: int i = 5; i ; // i becomes 6; int j = i ; // i becomes 7, j becomes 6.

What does i++ mean in c++

What is i

In C, i is a postfix increment operator used to increment the variable i The value is increased by 1.

How to use i

i operator is usually placed after the variable i, for example:

<code class="cpp">int i = 0;
i++; // 将 i 的值从 0 增加到 1</code>

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How i works## The

#i operator performs the following two operations:

Increase the value of variable i by 1 (for example, increase 0 to 1).

It is important to note that the i operator only changes the value of variable i and does not return its new value. Therefore, the following code will not print 1:

<code class="cpp">cout << i++; // 输出 0，而不是 1</code>

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Instead, i can be used like this to print the new value:

<code class="cpp">cout << ++i; // 输出 1</code>

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Example

Here is A few examples of i:

<code class="cpp">int i = 5;
i++; // i 的值变为 6
int j = i++; // i 的值变为 7，j 的值变为 6</code>

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Note

i is a postfix operator, which means it increments the variable only after evaluating the expression. The opposite is the prefix increment operator i, which increments the variable before evaluating the expression.

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