Table of Contents
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:
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#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:
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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:
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#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:
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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:
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#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:
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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:
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#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:
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#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
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#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
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#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
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#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:
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#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:
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#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:
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#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:
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#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
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#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:
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#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:
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#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.
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#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:
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#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:
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#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:
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#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:
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#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:
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#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
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#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"; } |
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