Question

Write a C++ main program that has the following 5 short independent segments.

6. Show the results of the following power function: pow(-2., 3), pow(-2., 3.0) , pow(-2., 3.00000000001)

7. Show the memory size of the following constants 1. , 1.F, 1 , '1' , and "1"

8. Display 1./3. using 20 digits and show the correct and incorrect digits

9. Display all printable characters of the ASCII table in 3 columns: first column: 32-63, second column: 64-95, third column: 96-127. Each column must include the numeric value and the corresponding character. Following is an example of one of 32 rows in the ASCII table: 33 ! 65 A 97 a

10. Compute sqrt(2.) using your own program for square root function.

Answer 1

#include<iostream>

#include<cmath>

#include<iomanip>

using namespace std;

//user defind sqrt function

float sqrt(float x)

{

    float sqr=x/2.0;

    float temp=0;

    while (sqr!=temp)

    {

        temp = sqr;

        sqr = ( x/temp + temp) / 2;

    }

    return sqr;

}

int main()

{

    cout<<"Segment 1:"<<endl;

    //calculating the power with the math function

    cout<<"pow(-2.,3):"<<pow(-2,3)<<endl;

    cout<<"pow(-2.,3.0):"<<pow(-2,3.0)<<endl;

    cout<<"pow(-2., 3.00000000001)"<<pow(-2., 3.00000000001)<<endl;

    cout<<"Segment 2:"<<endl;

    //getting the size of each data type

    cout<<"sizeof(1.):"<<sizeof(1.)<<endl;//double type

    cout<<"sizeof(1.F):"<<sizeof(1.F)<<endl;//float type

    cout<<"sizeof(1):"<<sizeof(1)<<endl;//integer

    cout<<"sizeof('1'):"<<sizeof('1')<<endl;//character

    cout<<"sizeof(\"1\"):"<<sizeof("1")<<endl;//string

    cout<<"Segment 3:"<<endl;

    //checking how many decimals are getting correct

    // as the type is double we can get 16 digit accuracy and remaing four digits are not accurate

    cout<<"1./3:"<<setprecision(20)<<1./3<<endl;

    cout<<"Segment 4:"<<endl;

    //displaying ascii table

    for(int i=32,j=64,k=96;i<=63&&j<=95&&k<=127;i++,j++,k++)

    {

        cout<<i<<" "<<(char)i<<"\t"<<j<<" "<<(char)j<<"\t"<<k<<" "<<(char)k<<endl;

    }

    //sqrt user defined function

    cout<<"Segment 5:"<<endl;

    cout<<"sqrt(2):"<<sqrt(2)<<endl;

}

output:

note: if you have any doubt please comment

i executed this file in ubuntu with g++ (GNU) compiler

thankyou