acosh()是C++ STL中的内置函数,它返回以弧度给出的角度的反双曲余弦值。
句法:
acosh(data_type x)
参数:该函数接受一个强制性参数x,该参数指定弧度中的反双曲角应大于或等于1。如果参数小于1,则返回-nan。该参数可以是double,float或long double数据类型。
返回值: acosh()函数以弧度返回参数的反双曲正弦值,范围为[0,inf]。
下面的程序说明了上述方法:
程序1:
// C++ program to demonstrate
// the acosh() function
#include
using namespace std;
int main()
{
double x = 50.0;
// Function call to calculate acosh(x) value
double result = acosh(x);
cout << "acosh(50.0) = " << result << " radians" << endl;
cout << "acosh(50.0) = " << result * 180 / 3.141592
<< " degrees" << endl;
return 0;
}
输出:
acosh(50.0) = 4.60507 radians
acosh(50.0) = 263.851 degrees
程式2:
// C++ program to demonstrate
// the acosh() function
#include
using namespace std;
int main()
{
int x = 40.0;
// Function call to calculate acosh(x) value
double result = acosh(x);
cout << "acosh(40.0) = " << result << " radians" << endl;
cout << "acosh(40.0) = " << result * 180 / 3.141592
<< " degrees" << endl;
return 0;
}
输出:
acosh(40.0) = 4.38187 radians
acosh(40.0) = 251.063 degrees
错误和异常:当将字符串或字符作为参数传递时,该函数返回任何匹配函数来调用错误。
程序3:
// C++ program to demonstrate
// the acosh() function
#include
using namespace std;
int main()
{
string x = "gfg";
// Function call to calculate acosh(x) value
double result = acosh(x);
cout << "acosh(50.0) = " << result << " radians" << endl;
cout << "acosh(50.0) = " << result * 180 / 3.141592
<< " degrees" << endl;
return 0;
}
输出:
prog.cpp:11:25: error: no matching function for call to 'acosh(std::__cxx11::string&)'
double result = acosh(x);
计划4:
// C++ program to demonstrate
// the acosh() function
// value less than 1
#include
using namespace std;
int main()
{
double x = -50.0;
// Function call to calculate acosh(x) value
double result = acosh(x);
cout << "acosh(-50.0) = " << result << " radians" << endl;
cout << "acosh(-50.0) = " << result * 180 / 3.141592
<< " degrees" << endl;
return 0;
}
输出:
acosh(-50.0) = -nan radians
acosh(-50.0) = -nan degrees
要从最佳影片策划和实践问题去学习,检查了C++基础课程为基础,以先进的C++和C++ STL课程基础加上STL。要完成从学习语言到DS Algo等的更多准备工作,请参阅“完整面试准备课程” 。