C++ Input Output Statements (cout/cin) Practice 1

Task 1 & Task 2

Task 1: Write a program that prints a text of 4 lines consisting of characters , integer values and floating point values using cout statement
Code:

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	//initialize variables
	int n=80;
	float f=80.5555;
	char c='A';
	//print the text using cout statement
	cout<<"I am Code Seeker !\n";
	cout<<"I Scored "<<n<<" Marks in Programming\n";
	//set precision is used to set decimal places in floating point... this function comes under headerfile iomanip
	cout<<"My Overall Percentage was "<<setprecision(5)<<f<<endl;
	cout<<"My Grade is "<<c<<endl;
	return 0;
	// \n is used to move to next line and endl is used to end the line..
}

Output:

I am Code Seeker !
I Scored 80 Marks in Programming
My Overall Percentage was 80.555
My Grade is A

Task 2: Write a Program that inputs radius of sphere from user. It calculates Circumference and surface area using the formula
Area = A=4pir^2
Circumference = C =4/3(pi*r^3)
Where Pi = 3.1416
Answer should be upto 3 decimal digits.
Code:

Write a Program that inputs radius of sphere from user.
It calculates Circumference and surface area using the formula
Area = A=4*pi*r^2
Circumference = C =4/3(pi*r^3)
Where ?? = 3.1416
Answer should be upto 3 decimal digits.
*/
#include<iostream>
using namespace std;
int main()
{
	//declaring variables
	float pi=3.1416;
	float r;
	//taking input from user ...cin for input
	cout<<"Enter Radius of Sphere : ";
	cin>>r;
	//variables in which we have to store the result of Area and circum..
	float A=4*pi*r*r;
	float C=4/3*pi*r*r*r;
	cout<<"\nArea is : "<<A<<endl;
	cout<<"\nCircumference is : "<<C<<endl;
	return 0;
}

Output:

Enter Radius of Sphere : 3.6

Area is : 162.861

Circumference is : 146.574