Program for To read the two complex numbers and perform the addition and multiplication of these two numbers

In this program the complex number means it contains the two parts . first one

is real part and second one is imaginary part(2+3i).by taking these two complex numbers we can perform the addition and multiplication operation.

Program:

#include<stdio.h>
#include<math.h>
void arithmetic(int opern); struct comp
{
double realpart; double imgpart;

};
void main()
{
int opern; clrscr();

printf("\n\n \t\t\t***** MAIN MENU *****");
printf("\n\n Select your option: \n 1 : ADD\n 2 : MULTIPLY\n 0 : EXIT \n\n\t\t Enter your Option [ ]\b\b");
scanf("%d",&opern);
if(opern>2)
{
printf("invalid option");
}
else
{
switch(opern)
{
case 0: exit(0); case 1:
case 2:

arithmetic(opern);
  default:
 main();
}
}
getch();
}

void arithmetic(int opern)
{
struct comp w1, w2, w;
printf("\n Enter two Complex Numbers (x+iy):\n
eal Part of First Number:");
scanf("%lf",&w1.realpart);
printf("\n Imaginary Part of First Number:");
scanf("%lf",&w1.imgpart);

printf("\n Real Part of Second Number:"); 

scanf("%lf",&w2.realpart);

printf("\n Imaginary Part of Second Number:"); scanf("%lf",&w2.imgpart);

switch(opern)

{

/*addition of complex number*/

 case 1:

 w.realpart=w1.realpart+w2.realpart; w.imgpart=w1.imgpart+w2.imgpart; break;

/*multiplication of complex number*/

case 2:

w.realpart=(w1.realpart*w2.realpart)-(w1.imgpart*w2.imgpart); w.imgpart=(w1.realpart*w2.imgpart)+(w1.imgpart*w2.realpart); break;

}

if (w.imgpart>0)

printf("\n Answer = %lf+%lfi",w.realpart,w.imgpart); else

printf("\n Answer = %lf%lfi",w.realpart,w.imgpart); 

getch();

main();

}

Output:

***** MAIN MENU *****

Select your option: 

1 : ADD

2 : MULTIPLY

0 : EXIT

Enter your Option [ 1]

Enter two Complex Numbers (x+iy):

Real Part of First Number:2

Imaginary Part of First Number:2

Real Part of Second Number:2

Imaginary Part of Second Number:2

Answer = 4.000000+4.000000i

***** MAIN MENU *****

Select your option: 

1 : ADD

2 : MULTIPLY

0 : EXIT

Enter your Option [ 2]

Enter two Complex Numbers (x+iy):

Real Part of First Number:2

Imaginary Part of First Number:2

Real Part of Second Number:2

Imaginary Part of Second Number:2

Answer = 0.000000+8.000000i

***** MAIN MENU *****

Select your option: 

1 : ADD

2 : MULTIPLY

0 : EXIT

Enter your Option  3 

invalid option

***** MAIN MENU *****

Select your option:

 1 : ADD

2 : MULTIPLY

0 : EXIT

Enter your Option [ 0]

Conclusion: The program is error free

VIVA QUESTIONS:

1) Define structure ?

Ans: Structure is amethod for packing data of different types. Structure help to organize complex data in a more meaninigful way.

2) What is use of <math.h> header file ?

Ans: It is used to access the mathematical functions in programs.

Algorithm

Flow chart

program
c programs