Lab 3 part B

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

double sub(double num1, double num2){//write the prototypes.
  double result;// The function definitions.
  result=num1-num2;
  return result;
}
double multi(double num1, double num2){
double result;
result=num1*num2;
return result;
}
double add(double num1, double num2, double num3){
  double result;
  result=num1+num2+num3;
  return result;}
double every(double num1, double num2, double num3){
  double result;
  result=num1-num2-num3;
return result;
}

int main(void) {
double gross;// Declare the variables as doubles
double MPD= 75.65;// Set the constants
double SSTR= 0.0751;
double FITR=0.165;
double SITR=0.045;
double UFD=15.00;
double SS;
double fed;
double taxable;
double tests;
double taxes3;
double state;
double takehome;

while (tests){//This goes on for infinite loops.
printf("Enter Gross Pay: ");
scanf("%lg",&gross);// Have the user entereth Gross income.
if (gross>=15.00){// limits the gross income to above or equal to $15.00.
taxable=sub(gross,MPD);// Function Calls.
SS= multi(taxable,SSTR); //Social Security tax
fed=multi(taxable,FITR);//Federal Tax
state=multi(taxable,SITR);//State tax
taxes3=add(SS,fed,state);// Add the three taxes together.
takehome= every(taxable,taxes3,UFD);//taxable-(SS+fed+state)-United Fund.
printf("Social security tax= %lg\n Federal income tax= %lg\n State income tax= %lg\n Medical deduction= %lg\n United Fund= %lg\n Take-home pay= %lg\n\n",SS,fed,state,MPD, UFD,takehome);
}
if (gross<15.00){printf("Try again!\n"); }}// If the Gross is anything under the $15 limit, the program will tell the user to try again and loop them back to the beginning.


  return 0;}