valarray shift() in C++
The shift() function is defined in valarray header file. This function returns a new valarray of the same size with elements whose positions are shifted by n elements. If n is negative, right-shift is applied, if n is positive left-shift is applied.
Syntax:
valarray shift (int n) const;
Parameter: This method accepts a mandatory parameter n which represents the number of element to shift.
Returns: This function returns the new valarray after shifting elements.
Below programs illustrate the above function:
Example 1:-
// C++ program to demonstrate // example of shift() function. #include <bits/stdc++.h> using namespace std; int main() { // Initializing valarray valarray<int> varr = { 3, 2, 5, 4, 1 }; // Declaring new valarray valarray<int> varr1; // using shift() to shift elements to left // shifts valarray by 3 position varr1 = varr.shift(3); // Displaying elements of valarray after shifting cout << "The new valarray after shifting is = "; for (int& x : varr1) cout << x << " "; cout << endl; return 0; } |
Output:
The new valarray after shifting is = 4 1 0 0 0
Example 2:-
// C++ program to demonstrate // example of shift() function. #include <bits/stdc++.h> using namespace std; int main() { // Initializing valarray valarray<int> varr = { 3, 2, 5, 4, 1 }; // Declaring new valarray valarray<int> varr1; // using shift() to shift elements to right // shifts valarray by 2 position varr1 = varr.shift(-2); // Displaying elements of valarray after shifting cout << "The new valarray after shifting is = "; for (int& x : varr1) cout << x << " "; cout << endl; return 0; } |
Output:
The new valarray after shifting is = 0 0 3 2 5
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