C/C++
C++ Programming Example of Basic Input and Output stream objects
Description:
C++ Programming Example- in this article we discussed the most important and commonly used examples in c++.
cin C++ Stream object Programming Examples:
Write a program that inputs a character and displays its ASCII code using cin cout stream objects:
#include <iostream>
using namespace std;
main()
{
char ch;
int asc;
cout<<"Enter the character: ";
cin>>ch;
asc=ch;
cout<<"ASCII code of "<<ch<<"is: " <<asc;
}
Output:
Enter the character: B ASCII code of B is 66
Write a program that inputs time in seconds and converts it into standard format (such as hh:mm:ss format) using cin cout stream objects:
#include <iostream>
using namespace std;
main()
{
int seconds, ss,mm,hh;
cout<<"Enter time in second: ";
cin>>seconds;
hh=seconds/3600;
seconds=seconds%3600;
mm=seconds/60;
ss=seconds%60;
cout<<"time in hh:mm:ss format is: ";
cout<<hh<<":"<<mm<<":"<<ss;
}
Output:
Enter time in second: 5000 time in hh:mm:ss format is: 1:23:20
A car can travel 5.3 miles in one liter. Write a program that inputs petrol in liters and displays how much distance the car can cover using the available petrol using cin cout stream objects:
#include <iostream>
using namespace std;
main()
{
float petrol, distance;
cout<<"Enter petrol in liter: ";
cin>>petrol;
distance=5.3*petrol;
cout<<"car will cover distance "<<distance<<" miles";
}
Output:
Enter petrol in liter: 45 car will cover distance 238.5 miles
Example write a program that inputs the name, age, height and gender of a student using ‘cin C++ stream object’:
Flow chart:
Program:
#include <iostream>
using namespace std;
int main()
{
char name[16], gender[5];
float height;
int age;
cout<<"Enter Name of the Student: ";
cin>>name;
cout<<"Enter Age of the Student: ";
cin>>age;
cout<<"Enter Height of the Student: ";
cin>>height;
cout<<"Enter Sex of the Student: ";
cin>>gender;
cout<<"\n-------- Student Detail -----------";
cout<<"\nName of the student is: "<<name<<endl;
cout<<"Age of the student is: "<<age<<endl;
cout<<"Height of the student is: "<<height<<endl;
cout<<"Sex of the student is: "<<gender<<endl;
}
Example write a program that inputs distance in miles from user and converts miles into kilometers. One mile =1.609 kilometer using cin cout stream objects:
#include <iostream>
using namespace std;
int main()
{
float km, miles;
cout<<"Enter miles: ";
cin>>miles;
km=1.609 * miles;
cout<<miles<<" Miles = "<<km<<" Kilometers";
}
Example write a program in C++ to converts pound into kilograms using cin cout stream objects:
1 pound = 0.453592
#include <iostream>
using namespace std;
int main()
{
double kg, pounds;
cout<<"Enter in pounds: ";
cin>>pounds;
kg=0.453592 * pounds;
cout<<pounds<<" Pounds = "<<kg<<" Kilograms";
}
Example write a program in C++ which convert Inches to centimeters using cin cout stream objects:
1 inch = 2.54 centimeters
#include <iostream>
using namespace std;
int main()
{
float inches, cm;
cout<<"Enter in inches: ";
cin>>inches;
cm=2.54 * inches;
cout<<inches<<" Inches = "<<cm<<" Centimeters";
}
Example writes a program in C++ to calculate the volume and surface area of a sphere using cin cout stream objects:
Formula:
area of sphere = 4π R2
circumference f sphere = 4/3 πR3
the value of π is = 3.1417
#include <iostream>
using namespace std;
int main()
{
float r, area,circum;
float pi = 3.1417;
cout<<"Enter radius of sphere: ";
cin>>r;
area= 4.0 *pi*r*r;
circum=(4.0/3.0)*pi*r*r*r;
cout<<"Area of sphere = "<<area<<endl;
cout<<"Circumference of sphere = "<<circum;
}
Example write a program in C++ which calculate the area and circumference of the circle using cin cout stream objects:
Formula:
area of circle = π R2
circumference of circle= 2πR
the value of π is = 3.1417
Flowchart:
#include <iostream>
using namespace std;
int main()
{
float r, area, circum, pi=3.1417;
cout<<"Enter Radius of circle: ";
cin>>r;
area= pi*r*r;
circum= 2*pi*r;
cout<<"Area of circle = "<<area<<endl;
cout<<"Circumference = "<<circum;
}
Example write a temperature program in C++ which converts the Fahrenheit to Centigrade using cin cout stream objects:
C=5/9(F-32)
Flowchart:
#include <iostream>
using namespace std;
int main()
{
float f,c;
cout<<"Enter Temperature in Fahrenheit: ";
cin>>f;
c= 5/9.0 * (f-32);
cout<<"Temperature in Centigrade: "<<c;
}
Example write a program that inputs marks obtained by a student in five different subject and find out aggregate marks (total marks) and percentage using cin cout stream objects:
#include <iostream>
using namespace std;
int main()
{
float math, cpp, os, dbms, eng, total, avg;
cout<<"Enter marks of Mathematics: ";
cin>>math;
cout<<"Enter marks of CPP: ";
cin>>cpp;
cout<<"Enter marks of OS: ";
cin>>os;
cout<<"Enter marks of DBMS: ";
cin>>dbms;
cout<<"Enter marks of English: ";
cin>>eng;
total= math+os+cpp+dbms+eng;
avg= total/5.0;
cout<<"\nTotal marks: "<<total<<endl;
cout<<"\nAverage marks: "<<avg<<endl;
}
Example write a program that inputs the value of three sides of a triangle and finds out its area using cin cout stream objects:
Formula:
#include <iostream>
#include<math.h>
using namespace std;
int main()
{
float a,b,c,s,area;
cout<<"Enter first side f triangle: ";
cin>>a;
cout<<"Enter second side f triangle: ";
cin>>b;
cout<<"Enter third side f triangle: ";
cin>>c;
s=(a+b+c)/2.0;
area = sqrt(s*(s-a)*(s-b)*(s-c));
cout<<"\nArea of triangle = "<<area;
}
Example write a program which consists of three variable Area, Perpendicular, and Base. The program inputs the values in variables per and base from the user and computes the area of a triangle using cin cout stream objects:
Formula:
Area = (base*per)/2
#include <iostream>
using namespace std;
int main()
{
float base, per,area;
cout<<"Enter value of Base: ";
cin>>base;
cout<<"Enter value of Per: ";
cin>>per;
area=(base*per)/2.0;
cout<<"Area of triangle = "<<area;
}
C++ Programming Example: write a program in C++ which reverse the order of the long numbers using cin cout stream objects:
#include <iostream>
using namespace std;
int main()
{
long n, a, b,c;
cout<<"Enter Numbers: ";
cin>>n;
a=n/1000;
n=n%1000;
b=n/100;
n=n%100;
c=n/10;
n=n%10;
cout<<"Long number in reverse order: "<<n<<c<<b<<a;
}
C++ Programming Example: Write a program that inputs the current price of gas and electricity per unit. Give each item’s rate with an increment of 20%. The program computes the new price of gas and electricity using cin cout stream objects:
#include <iostream>
using namespace std;
int main()
{
float elect, gas;
cout<<"Enter the current price of electricity: ";
cin>>elect;
cout<<"Enter the current price of gas: ";
cin>>gas;
cout<<"New electricity rate = "<<elect+elect*20/100;
cout<<"\nNew gas rate = "<<gas+gas*20/100;
}
C++ Programming Example: write a program which calculate the employee dearness allowance, medical allowance, house rent allowance and calculate the gross salary and display using cin cout stream objects:
25% dearness allowance.
15% medical allowance.
45% house rent allowance.
formula:
gross salary= basic pay + dearness allowance + medical allowance + house rent.
#include <iostream>
using namespace std;
int main()
{
double basic, da, ma, hr, gross;
cout<<"Enter basic salary: ";
cin>>basic;
da=0.25*basic;
ma = 0.15*basic;
hr = 0.45*basic;
gross= basic+da+ma+hr;
cout<<"Gross salary = "<<gross;
}
The ‘cout’ C++ Stream Object Programming Examples:
C++ Programming Example: write a program that computes and display the area of a square. The formula to compute the area of square is using cout stream object:
Area = height * width;
Flowchart:
#include <iostream>
using namespace std;
int main()
{
int height, width, area;
height = 15;
width= 3;
area = height * width;
cout<<"Area of square ="<<area;
}
It the above program “Area of square =” is a text message. The text message will be displayed first and the value of variable ‘area’ will be displayed.
C++ Programming Example: write a program that adds two floating point values and displays the sum on the screen using cout stream object:
#include <iostream>
using namespace std;
int main()
{
float a, b,s;
a=20.3;
b=50.2;
s=a+b;
cout<<"Sum of "<<a<<" and "<<b<<" is ="<<s;
}
C++ Programming Example: write program that converts 45.6 centigrade temperature into Fahrenheit using the formula F=9/5(C+32) and displays the temperature in Fahrenheit using cout stream object:
#include <iostream>
using namespace std;
int main()
{
float f,c;
c=45.6;
f=9/5.0*c+32;
cout<<c<<" Centigrade = "<<f<<" Fahrenheit";
}
C++ Programming Example: write a program which convert age in moths and days using cout stream object:
#include <iostream>
using namespace std;
int main()
{
float age, days,months;
age=20;
months=age*12;
days= age*365;
cout<<"Age in months = "<<months<<endl;
cout<<"Age in days = "<<days<<endl;
}
C++ Programming Example: write a program that displays values of integer, floating point variable and character variable on the screen using cout stream object:
#include <iostream>
using namespace std;
int main()
{
int a= 88;
float b = 44.3;
char ch= 'P';
cout<<"Value of Integer variable is: "<<a<<endl;
cout<<"Value of Floating point variable is: "<<b<<endl;
cout<<"Value of Character variable is: "<<ch<<endl;
}
C++ Programming Example: write a program that calculates the distance covered by a body in 20.5 seconds. The initial velocity of body is 15.8 meter per second and acceleration is 10.2m/sec2 using cout stream object:
Formula:
S=vit+1/2at2
#include <iostream>
using namespace std;
int main()
{
float vi, a, t, s;
t=20.5;
vi=15.8;
a=10.2;
s=vi*t+1/2.0*a*t*t;
cout<<"Distance covered = "<<s<<" meters";
}
Related article:
