Fahrenheit to Celsius using C++

Write C++ program to read temperature in Fahrenheit and print it in Celsius.

#include<iostream>
using namespace std;

int main()
{
  float f,c;
  cout << "Enter temperature in Fahrenheit(f)=";
  cin >> f;

  c = 5 * ( f - 32 ) / 9;

  cout<<"Temperature in Celsius = " << c;

  return 0;
}

Output of program

Enter temperature in Fahrenheit(f)=100
Temperature in Celsius = 37.7778

Simple Interest using C++ Program.

#include<iostream>
using namespace std;

int main()
{
  float P,R,N,I;

  cout<<"Enter Principle Amount: ";
  cin>>P;

  cout<<"Enter Rate of Interest: ";
  cin>>R;

  cout<<"Enter No. of Years: ";
  cin>>N;

  I=(P*R*N)/100;

  cout<<"Simple interest is : "<< I;

  return 0;
}

Output of Program

Enter Principle Amount: 1000
Enter Rate of Interest: 12
Enter No. of Years: 2
Simple interest is : 240

Using char variable in C++ programs.

#include<iostream>
using namespace std;

int main()
{
  char name[20];

  cout<<"Enter your name: ";
  cin>>name;

  cout<<"Your Name is : "<< name;
  return 0;
}

Output of program

Enter your name: Earth
Your Name is : Earth

Note: This program will be able to read only one word as your name.

Using int in C++ Program

Example of using integer variables in C++ programs.

#include<iostream>
using namespace std;

int main()
{
int rollno;
cout<<"What is your Roll Number? ";
cin>>rollno;
cout<<"Your Roll Number is "<<rollno;
return 0;
}

Output of Program

What is your Roll Number? 101
Your Roll Number is 101

Hello World in C++

Let’s begin with a simple C++ program to display "Hello World" on the screen.

Example: Hello World Program in C++

#include <iostream> using namespace std; int main()  {     cout << "Hello World";     return 0; }

Output of program

Hello World

Description of Program

• C++ program starts from the main() function.
• cout is the standard output stream to print "Hello, World!" on monitor.
• return 0; indicates program ends and returns 0 to calling program.

* * * * *

Difference between C and Python

C and Python are general purpose computer programming language. Python is generally preferred for server side scripting. Some of the key difference between C and Python are given below:

Table: Difference between C and Python

C Language	Python Language
Designed by Dennis Richie	Product from Python Software Foundation
C programs are faster but coding is complex and long	Coding is easier and short in Python
C requires type declaration	Python does not require type declaration
C supports in line assignment	Python does not support in line assignment