C++ <valarray> - cshift() Function
The C++ valarray::cshift function returns a new valarray of the same size with elements rotated left by n spaces (or rotated right if n is negative). The new position of each element is (i − n)%s, where i is the previous position and s is size of valarray.
Syntax
valarray cshift (int n) const;
Parameters
n |
Specify number of elements to rotate. If positive, it is rotated left. If negative, it is rotated right. |
Return Value
Returns valarray with circularly shifted elements.
Time Complexity
Depends on library implementation.
Example:
The example below shows the usage of valarray::cshift function.
#include <iostream>
#include <valarray>
using namespace std;
int main (){
valarray<int> varr = {10, 20, 30, 40, 50};
cout<<"varr contains: ";
for(int i = 0; i < varr.size(); i++)
cout<<varr[i]<<" ";
valarray<int> result1 = varr.cshift(2);
cout<<"\nvarr.cshift(2) returns: ";
for(int i = 0; i < result1.size(); i++)
cout<<result1[i]<<" ";
valarray<int> result2 = varr.cshift(-1);
cout<<"\nvarr.cshift(-1) returns: ";
for(int i = 0; i < result2.size(); i++)
cout<<result2[i]<<" ";
return 0;
}
The output of the above code will be:
varr contains: 10 20 30 40 50 varr.cshift(2) returns: 30 40 50 10 20 varr.cshift(-1) returns: 50 10 20 30 40
❮ C++ <valarray> Library
