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C++ asinh()用法及代碼示例


asinh()是C++ STL中的內置函數,它返回以弧度給出的角度的反雙曲正弦值。

用法:

asinh(data_type x)

參數:該函數接受一個強製性參數x,該參數以弧度指定反雙曲角。它可以是任何值,即負,正或零。該參數可以是double,float或long double數據類型。


返回值:此函數以弧度返回參數的反雙曲正弦值。

下麵的程序演示了上述函數:

示例1:

// C++ program to demonstrate 
// the asinh() function 
#include <bits/stdc++.h> 
using namespace std; 
  
int main() 
{ 
    double x = 50.0; 
  
    // Function call to calculate asinh(x) value 
    double result = asinh(x); 
  
    cout << "asinh(50.0) = " << result << " radians" << endl; 
    cout << "asinh(50.0) = " << result * 180 / 3.141592 
         << " degrees" << endl; 
    return 0; 
}
輸出:
asinh(50.0) = 4.60527 radians
asinh(50.0) = 263.863 degrees

示例2:

// C++ program to demonstrate 
// the asinh() function 
#include <bits/stdc++.h> 
using namespace std; 
  
int main() 
{ 
    int x = -50.0; 
  
    // Function call to calculate asinh(x) value 
    double result = asinh(x); 
  
    cout << "asinh(-50.0) = " << result << " radians" << endl; 
    cout << "asinh(-50.0) = " << result * 180 / 3.141592 
         << " degrees" << endl; 
    return 0; 
}
輸出:
asinh(-50.0) = -4.60527 radians
asinh(-50.0) = -263.863 degrees

錯誤和異常:當字符串或字符作為參數傳遞時,該函數不返回任何匹配函數來調用錯誤。
示例3:

// C++ program to demonstrate 
// the asinh() function 
#include <bits/stdc++.h> 
using namespace std; 
  
int main() 
{ 
    string x = "gfg"; 
  
    // Function call to calculate asinh(x) value 
    double result = asinh(x); 
  
    cout << "asinh(50.0) = " << result << " radians" << endl; 
    cout << "asinh(50.0) = " << result * 180 / 3.141592 
         << " degrees" << endl; 
    return 0; 
}

輸出:

prog.cpp:11:25: error: no matching function for call to 'asinh(std::__cxx11::string&)'
  double result = asinh(x);


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注:本文由純淨天空篩選整理自pawan_asipu大神的英文原創作品 asinh() function in C++ STL。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。