SE Experiment no 9

Boundary value analysis

#include<stdio.h>

#include<iostream.h>

#include<conio.h>

#include<math.h>

void main(){

int a,b,c,d;

clrscr();

cout<<"The Quadratic equation is of the type a(x^2)+bx+c=0"<<endl;

cout<<"Enter the value of a: "<<endl;

cin>>a;

cout<<"Enter the value of b: "<<endl;

cin>>b;

cout<<"Enter the value of c: "<<endl;

cin>>c;

d=(b*b)-4*a*c;if((a<0)||(b<0)||(c<0)||(a>100)||(b>100)||(c>100))

cout<<"Invalid input"<<endl;

else if(a==0)

cout<<"Not a quadratic equation"<<endl;

else if (d==0)

cout<<"Roots are equal"<<endl;

else if(d<0)

cout<<"Imaginary roots"<<endl;

else

cout<<"Real Roots"<<endl;

getch();

}

OUTPUT:

The Quadratic equation is of the type a(x^2)+bx+c=0

Enter the value of a:

50

Enter the value of b:

50

Enter the value of c:

0

Real Roots

The Quadratic equation is of the type a(x^2)+bx+c=0

Enter the value of a:

50

Enter the value of b:

50

Enter the value of c:

50

Imaginary roots

The Quadratic equation is of the type a(x^2)+bx+c=0

Enter the value of a:

50

Enter the value of b:

100

Enter the value of c:

50

Roots are equal

Invalid input

The Quadratic equation is of the type a(x^2)+bx+c=0

Enter the value of a:

0

Enter the value of b:

50

Enter the value of c:

50

Not a quadratic equation

Equivalence Class Testing.

include <iostream.h>

#include<conio.h>

#include<math.h>

void main(){

int side1,side2,side3,match=0;

cout<<"Enter length of side1"<<endl;

cin>>side1;

cout<<"Enter length of side2"<<endl;

cin>>side2;

cout<<"Enter length of side3"<<endl;

cin>>side3;

if(side1==side2)

match=match+1;

else

if(side1==side3)

match=match+2;

else

if(side2==side3)

match=match+3;

if(match==0){

if((side1+side2)<=side3)

cout<<"not a triangle";

else{

if((side1+side3)<=side2)

cout<<"not a triangle";

else

cout <<"triangle is scalene";

}}

else

if(match==2){

if((side1+side3)<=side2)

cout<<"not a triangle";

else

cout<<"triangle is isosceles";

}

else

if(match==3){

if((side2+side3)<=side1)

cout<<"not a triangle";

else

cout<<"triangle is isosceles";

}

else{

cout<<"triangle is equilateral";}

getch();

}

OUTPUT1:

Enter length of side1

50

Enter length of side2

50

Enter length of side3

50

triangle is equilateral

OUTPUT2:

Enter length of side1

10

Enter length of side2

50

Enter length of side3

50

triangle is isosceles

OUTPUT3:

Enter length of side1

10

Enter length of side2

20

Enter length of side3

50

triangle is scalene

OUTPUT4:

Enter length of side1

10

Enter length of side2

30

Enter length of side3

50

not a triangle

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