- The C Standard Library
- The C Standard Library
- The C++ Standard Library
- C++ Library - Home
- C++ Library - <fstream>
- C++ Library - <iomanip>
- C++ Library - <ios>
- C++ Library - <iosfwd>
- C++ Library - <iostream>
- C++ Library - <istream>
- C++ Library - <ostream>
- C++ Library - <sstream>
- C++ Library - <streambuf>
- C++ Library - <atomic>
- C++ Library - <complex>
- C++ Library - <exception>
- C++ Library - <functional>
- C++ Library - <limits>
- C++ Library - <locale>
- C++ Library - <memory>
- C++ Library - <new>
- C++ Library - <numeric>
- C++ Library - <regex>
- C++ Library - <stdexcept>
- C++ Library - <string>
- C++ Library - <thread>
- C++ Library - <tuple>
- C++ Library - <typeinfo>
- C++ Library - <utility>
- C++ Library - <valarray>
- The C++ STL Library
- C++ Library - <array>
- C++ Library - <bitset>
- C++ Library - <deque>
- C++ Library - <forward_list>
- C++ Library - <list>
- C++ Library - <map>
- C++ Library - <queue>
- C++ Library - <set>
- C++ Library - <stack>
- C++ Library - <unordered_map>
- C++ Library - <unordered_set>
- C++ Library - <vector>
- C++ Library - <algorithm>
- C++ Library - <iterator>
- C++ Programming Resources
- C++ Programming Tutorial
- C++ Useful Resources
- C++ Discussion
C++ Valarray::acos Function
The C++ Valarray::acos() function calculates the arc cosine of each element's value in a valarray and produces a valarray that contains the results.
The C++ acos() function returns the inverse cosine of an integer in radians. For each element, it makes a single call to the cmath's acos() method, which it overloads.
Syntax
Following is the syntax for C++ Valarray::acos Function −
acos (const valarray<T>& x);
Parameters
x − It is containing elements of a type for which the unary function acos is defined.
Examples
Example 1
Let's look into the following example, where we are going to use the acos() function and retrieving the output.
#include <iostream> #include <valarray> using namespace std; int main() { valarray<double> varr = { 1, 0.25, 0.75, 0.5, 0 }; valarray<double> valarraay1; valarraay1 = acos(varr); cout << "The acos Valarray" << " Value : " << endl; for (double& x : valarraay1) { cout << x << " "; } cout << endl; return 0; }
Output
Let us compile and run the above program, this will produce the following result −
The acos Valarray Value : 0 1.31812 0.722734 1.0472 1.5708
Example 2
In the following example,we are going to use the acos() function and retrieving the output with comparison of original and acos Valarray.
#include <iostream> #include <valarray> using namespace std; int main() { valarray<int> myvalarr = { 12, 143, 3, 7, 9 }; cout << "The Orignal Valarray : "; for (int& ele : myvalarr) cout << ele << " "; valarray<int> acosvalarray = acos(myvalarr); cout << "\nThe acos Valarray : "; for (int& ele : acosvalarray) cout << ele << " "; return 0; }
Output
Let us compile and run the above program, this will produce the following result −
The Orignal Valarray : 12 143 3 7 9 The acos Valarray : -2147483648 -2147483648 -2147483648 -2147483648 -2147483648
Example 3
Following is the another scenario, where we are going to use the acos() function with integral type and retrieving the output in radians, degrees.
#include <iostream> #include <cmath> using namespace std; int main() { int x = -0.75; double result; result = acos(x); cout << "acos(x) = " << result << " radians" << endl; cout << "acos(x1) = " << result*180/3.1415 << " degrees"; return 0; }
Output
Let us compile and run the above program, this will produce the following result −
acos(x) = 1.5708 radians acos(x1) = 90.0027 degrees
To Continue Learning Please Login
Login with Google