Intro C++ : Write the code ===> Problem 1: Given an integer variable i and a flo

Question

Intro C++ : Write the code

===> Problem 1:

Given an integer variable i and a floating-point variable f, write a statement that writes both of their values to standard output in the following format: i=value -of-i f=value -of-f

Thus, if i has the value 25 and f has the value 12.34, the output would be:

i=25 f=12.34

But if i has the value 187 and f has the value 24.06, the output would be:

i=187 f=24.06

====> Problem 2:

Assume that x is a double variable that has been initialized . Write a statement that prints it out, guaranteed to have a decimal point, but without forcing scientific (also known as exponential or e-notation).

=====> Problem 3:

Assume that x is a double variable that has been given a value . Write a statement that prints it out with exactly three digits to the right of the decimal point no matter what how big or miniscule its value is.

====> Problem 4:

Declare k, d, and s so that they can store an integer , a real number, and a small word (under 10 characters ).

Use these variables to first read in an integer , a real number, and a small word and print them out in reverse order (i.e., the word, the real, and then the integer ) all on the same line, separated by EXACTLY one space from each other.

Then, on a second line, print them out in the original order (the integer , the real, and the word), separated again by EXACTLY one space from each other.

Explanation / Answer

//Problem1-solution
#include<iostream>
using namespace std;

int main()
{
   //declare i as integer
   int i;
   //declare f as float
   float f;

   cout<<"Enter i-value : ";
   //read integer i value
   cin>>i;

   cout<<"Enter f-value : ";
   //read float f value
   cin>>f;

   //print i and f values
   cout<<"i="<<i<<" f="<<f<<endl;

   //pause the program output on console
   system("pause");
   return 0;
}

Output:
Enter i-value : 25
Enter f-value : 12.34
i=25 f=12.34
----------------------------------------------------------------------------
//Problem2-solution
//C++ program that prints the decimal values
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{  
   //declare x asdouble
   double x;
   cout<<"Enter x-value : ";
   //read integer i value
   cin>>x;  
   //print x value
   cout<<fixed<<setprecision(2)
       <<"x="<<x<<endl;
   //pause the program output on console
   system("pause");
   return 0;
}
Output:
Enter x-value : 50
x=50.00

-----------------------------------------------------------------------------------------
//Problem3 solution:

//C++ program that prints the decimal values
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{  
   //declare x asdouble
   double x=50;  
   //print x value upto three decimal places      
   ios::right;
   //set width =6 and set precision 3 digits
   cout<<setw(6)<<fixed<<setprecision(3)<<
       "x="<<x<<endl;
   //pause the program output on console
   system("pause");
   return 0;
}
Output:
   x=50.000

--------------------------------------------------------------------
//Program 4 solution
#include<iostream>
using namespace std;
int main()
{  
   int k;//integer variable
   double d;//real number
   char s[10];//char array of size=10
  
  
   cout<<"Enter k-value: ";
   cin>>k;
   cout<<"Enter d-value: ";
   cin>>d;
   cout<<"Enter s-word: ";
   cin>>s;

   cout<<"Reverse order"<<endl;
   cout<<s<<" "<<d<<" "<<k<<endl;

   cout<<"Original order"<<endl;
   cout<<k<<" "<<d<<" "<<s<<endl;

  
  
   //pause the program output on console
   system("pause");
   return 0;
}

Output:

Enter k-value: 5
Enter d-value: 10.5
Enter s-word: hello
Reverse order
hello 10.5 5
Original order
5 10.5 hello

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