Question

C++ Question!

Write a procedure

void reverse(vector& v)

that reverses the elements in a vector.

Answer 1

If you have any doubts, please give me comment...

#include<iostream>

#include<vector>

using namespace std;

void reverse(vector<int> &v);

int main(){

vector<int> vec;

vec.push_back(1);

vec.push_back(2);

vec.push_back(3);

vec.push_back(4);

vec.push_back(5);

cout<<"Original Order: "<<endl;

for(int i=0; i<vec.size(); i++){

cout<<vec[i]<<" ";

}

cout<<endl;

reverse(vec);

cout<<"After reverse Order: "<<endl;

for(int i=0; i<vec.size(); i++){

cout<<vec[i]<<" ";

}

cout<<endl;

return 0;

}

void reverse(vector<int> &v){

int n = v.size();

for(int i=0;i<n/2; i++){

int temp = v[i];

v[i] = v[n-i-1];

v[n-i-1] = temp;

}

}