c語言 函數的參數傳遞示例

C ++附近的int()函數 (C++ nearbyint() function)

nearbyint() function is a library function of cmath header, it is used to round the given value to an integral value based on the specified direction by fegetround() function. It accepts a value and returns the rounded integral value.

nearint()函數是cmath標頭的庫函數，用于通過fegetround()函數根據指定方向將給定值舍入為整數值。 它接受一個值并返回四舍五入的整數值。

Syntax of nearbyint() function:

附近的int()函數的語法：

C++11:

C ++ 11：

double nearbyint (double x);float nearbyint (float x); long double nearbyint (long double x);double nearbyint (T x);

Parameter(s):

參數：

• x – represents the value to round.

  x –表示要取整的值。

Return value:

返回值：

It returns value rounded to nearby integral.

它返回四舍五入到附近整數的值。

Example:

例：

Input:double x = 123.4;Function call:nearbyint(x);Output:123Input:double x = 123.5;Function call:nearbyint(x);Output:124

C ++代碼來演示Nearestint()函數的示例 (C++ code to demonstrate the example of nearbyint() function)

// C++ code to demonstrate the example of // nearbyint() function#include <iostream> #include <cmath> #include <fenv.h> // for fegetround() using namespace std;int main() {double x = 0.0;cout << "Specified rounding is: ";switch (fegetround()) {case FE_DOWNWARD:cout << "Downward" << endl;break;case FE_TONEAREST:cout << "To-nearest" << endl;break;case FE_TOWARDZERO:cout << "Toward-zero" << endl;break;case FE_UPWARD:cout << "Upward" << endl;break;default:cout << "Unknown" << endl;}x = 123.4;cout << "nearbyint(" << x << "): " << nearbyint(x) << endl;x = 123.5;cout << "nearbyint(" << x << "): " << nearbyint(x) << endl;x = 123.6;cout << "nearbyint(" << x << "): " << nearbyint(x) << endl;x = -123.4;cout << "nearbyint(" << x << "): " << nearbyint(x) << endl;x = -123.5;cout << "nearbyint(" << x << "): " << nearbyint(x) << endl;x = -123.6;cout << "nearbyint(" << x << "): " << nearbyint(x) << endl;return 0; }

Output

輸出量

Specified rounding is: To-nearest nearbyint(123.4): 123 nearbyint(123.5): 124 nearbyint(123.6): 124 nearbyint(-123.4): -123 nearbyint(-123.5): -124 nearbyint(-123.6): -124

Reference: C++ nearbyint() function

參考： C ++附近的int()函數

翻譯自: https://www.includehelp.com/cpp-tutorial/nearbyint-function-with-example.aspx

c語言 函數的參數傳遞示例

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