What does inf mean in c++

The infinf in C is a macro that represents infinity. It is a floating-point constant used to represent infinity values, limit values ​​as algorithm stopping conditions, or to handle infinity in mathematical operations. It has two forms: positive infinity and negative infinity. It is limited by the IEEE floating point number standard and is not infinity in the true sense.

inf

inf in C is a macro that represents infinity in C. It is a floating point constant, defined by the <climits> header file.

Usage

inf is often used to represent infinite values, for example:

• Initialize an infinite array or container
• The limit value as the stopping condition of the algorithm
• Handling the infinity that may appear in mathematical operations

Note

• inf is a float point, and therefore subject to the limitations of the IEEE floating point standard. It's not really infinite.
• inf can be positive infinity (std::numeric_limits<double>::infinity()) or negative infinity (-std::numeric_limits<double>::infinity() ).

Example

<code class="cpp">#include <iostream>
#include <climits>
using namespace std;

int main() {
    // 创建一个无穷大的数组
    int arr[std::numeric_limits<int>::max()];

    // 计算无穷大和有限数的和
    double sum = 1.0 + std::numeric_limits<double>::infinity();
    cout << "无穷大和有限数的和： " << sum << endl;

    // 判断是否达到无穷大的停止条件
    while (i < std::numeric_limits<int>::max()) {
        // ...
    }

    return 0;
}</code>

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