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templates and vectors in c++

Mudassir Shoukat answered on December 7, 2022 Popularity 5/10 Helpfulness 6/10

answer templates and vectors in c++

templates and vectors in c++

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/* Test vector template class (TestVectorTemplate.cpp) */
#include <iostream>
#include <vector>
#include <string>
using namespace std;
 
void print(const vector<int> & v);
 
int main() {
   vector<int> v1(5);  // Create a vector with 5 elements;
 
   // Assign values into v1, using array-like index []
   // You can retrieve the size of vector via size()
   for (int i = 0; i < v1.size(); ++i) {
      v1[i] = (i+1) * 2;          // no index-bound check for []
   }
 
   // Print vector content, using at()
   for (int i = 0; i < v1.size(); ++i) {
      cout << v1.at(i) << " ";    // do index-bound check with at()
   }
   cout << endl;
 
   vector<int> v2;   // Create a vector with 0 elements
   // Assign v1 to v2 memberwise
   v2 = v1;
   for (int i = 0; i < v2.size(); ++i) {
      cout << v2[i] << " ";
   }
   cout << endl;
 
   // Compare 2 vectors memberwise
   cout << boolalpha << (v1 == v2) << endl;
 
   // Append more elements - dynamically allocate memory
   v1.push_back(80);
   v1.push_back(81);
   for (int i = 0; i < v1.size(); ++i) {
      cout << v1[i] << " ";
   }
   cout << endl;
 
   // Remove element from the end
   v1.pop_back();
   for (int i = 0; i < v1.size(); ++i) {
      cout << v1[i] << " ";
   }
   cout << endl;
 
   vector<string> v3;  // Create a vector of string with 0 element
   v3.push_back("A for Apple");    // append new elements
   v3.push_back("B for Boy");
   for (int i = 0; i < v3.size(); ++i) {
      cout << v3[i] << " ";
   }
   cout << endl;
}

Popularity 5/10 Helpfulness 6/10 Language cpp

Source: www3.ntu.edu.sg

Tags: c++ templates

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Contributed on Dec 07 2022

Mudassir Shoukat

0 Answers Avg Quality 2/10

templates and vectors in c++

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