Write a function that displays the following the menu Make a

Write a function that displays the following the menu Make a choice Solve a quadratic equation Find Factorial of a number Check whether the numbers form a pythagorean triplet Press 0 to quit! Depending on user input, call the appropriate functions. The prototypes for the functions are as follows: void quad(double a, double b, double c) void fact(long a) int pyth (int a, int b, int c) Prompt the user for the arguments to these functions before calling them. Display the menu until the use: enters 0 to quit.

Solution

#include <stdio.h>
#include <math.h>
#include <stdlib.h>

void quadratic(float a,float b,float c) //function to solve quadratic equation
{
float d,root1,root2;
  
d = b * b - 4 * a * c;
  
if(d < 0){
printf(\"\ Roots are complex number.\ \");

printf(\"\ Roots of quadratic equation are: \");
printf(\"%.2f%+.2fi\",-b/(2*a),sqrt(-d)/(2*a));
printf(\", %.2f%+.2fi\",-b/(2*a),-sqrt(-d)/(2*a));
  
}
else if(d==0){
printf(\"\ Both roots are equal.\ \");

root1 = -b /(2* a);
printf(\"\ Root of quadratic equation is: %.2f \",root1);
  
}
else{
printf(\"\ Roots are real numbers.\ \");
  
root1 = ( -b + sqrt(d)) / (2* a);
root2 = ( -b - sqrt(d)) / (2* a);
printf(\"\ Roots of quadratic equation are: %.2f , %.2f\",root1,root2);
}

}

void factorial(int num) //function to calculate factorial of a number
{
long fact;
fact =1;
int i;
if (num < 0)
printf(\"\ Number should be positive\");

for(i=1;i<=num;i++)
fact = fact * i;
printf(\"\ Factorial of %d =%d\",num,fact);

}

void pythagorean(int a,int b,int c) //function to check if numbers form pythagorean triplet
{

if( (a == sqrt(b*b + c*c)) || (b == sqrt(a*a + c*c)) || (c == sqrt(a*a +b*b)))
printf(\"\ The three numbers form a pythagorean triplet\");
else

printf(\"\ The three numbers do not form a pythagorean triplet\");

}
int main(void)
{
int num,choice;
int a,b,c;
float x,y,z;
printf(\"\ ************************************************************\");
printf(\"\ 1. Solve the quadratic equation\");
printf(\"\ 2. Find the factorial of a number\");
printf(\"\ 3. Check whether the numbers form a pythagorean triplet\");
printf(\"\ Press 0 to quit\");
printf(\"\ ************************************************************\ \");

scanf(\"%d\",&choice);
switch(choice)
{
case 1: printf(\"\ Enter the values of x,y and z in the equation\");
scanf(\"%f %f %f\",&x,&y,&z);
quadratic(x,y,z);
break;

case 2: printf(\"\ Enter the number\");
scanf(\"%d\",&num);
factorial(num);
break;

case 3: printf(\"\ Enter the triplet numbers\");
scanf(\"%d %d %d\",&a,&b,&c);
pythagorean(a,b,c);
break;

case 0:
break;   
}
}

Output