C++ Tutorial/Data Types/int read

Read int and char array from keyboard

<source lang="cpp">#include <iostream>

1. include <stdio.h>

using namespace std; main(void) {

 int i;  
 char str[80];  
    
 cout << "I like Turbo C++.\n";  
    
 printf("You can use printf(), but most C++ programs don"t.\n");  
    
 cout << "enter a number: ";  
 cin >> i;  
    
 cout << "your number is " << i << "\n";  
    
 cout << "enter a string: ";  
 cin >> str;  
 cout << str;  
    
 return 0;  

}</source>

Read int and do the calculation

<source lang="cpp">#include <iostream> using namespace std; int main() {

  cout << "How many pennies do you have? ";
  int count;
  cin >> count;
  double total = count * 0.01;
  cout << "How many nickels do you have? ";
  cin >> count;
  total = count * 0.05 + total;
  cout << "How many dimes do you have? ";
  cin >> count;
  total = count * 0.10 + total;
  cout << "How many quarters do you have? ";
  cin >> count;
  total = count * 0.25 + total;
  
  cout << "Total value = " << total << "\n";
  return 0;

}</source>

Read integer from console using cin

<source lang="cpp">#include <iostream> using namespace std;

int main() {

 int length; 
 int width;  
 
 cout << "Enter the length: "; 
 cin >> length; // input the length 

 cout << "Enter the width: "; 
 cin >> width;  // input the width  
 
 cout << "The area is ";  
 cout << length * width;
 
 return 0;  

}</source>

Enter the length: 12
Enter the width: 12
The area is 144"

Use relational operators to compare int type variables

<source lang="cpp">#include <iostream> using namespace std;

int main(){

  int numb;   
 
  cout << "Enter a number: ";   
  cin >> numb;   
  cout << "numb<10  is " << (numb < 10)  << endl;   
  cout << "numb>10  is " << (numb > 10)  << endl;   
  cout << "numb==10 is " << (numb == 10) << endl;   
  return 0;   

}</source>