Question

c++

Write a program that will use vectors to allow the user to input as many values as desired, and pass that vector to a function to search for a number. The function returns the index of where the number is found or that it didn't find the number. Uses Vectors and searching.

Answer 1

#include <iostream>
#include <vector>
using namespace std;

int main()
{
   vector<int> v;
   int size, val;
   cout<<"Enter size of the vector: ";
   cin>>size;
    
    cout<<"Enter "<<size<<" integers for vector"<<endl;
    for(int i = 0;i<size;i++){
       cin>>val;
       v.push_back(val);
   }
   cout<<endl;
   
   int key;
   cout<<"Enter number to search: ";
   cin>>key;
   
   bool flag = false;
   int res;
   for(int i = 0;i<size;i++){
      if(v[i] == key){
         flag = true;
         res = i;
      }
   }
   if(flag == true){
      cout<<key<<" found at index "<<res<<endl;
   }
   else{
      cout<<key<<" does not found"<<endl;
   }
   
    return 0;
}