Decision Making and Branching

Pay-Bill Calculations
Problem analysis:
Gross salary = basic pay + house rent allowance + perks
Net salary = Gross salary - income tax.
The computation of perks depends on the level, while the income tax depends on the gross salary, The major steps are:
1. Read data
2. Decide level number and calculate perks.
3 Calculate gross salary.
4. Calculate income tax.
5. Compute net salary.
6. Prints the results.
Program: A program and the results of the test data are given. Note that the last statement should be an executable statement. That is, the label stop: cannot be the last line.

#include <stdio.h>
#define CA1 1000
#define CA2 750
#define CA3 500
#define CA4 250
#define EA1 500
#define EA2 200
#define EA3 100
#define EA4 0
void main()
{
int level, jobnumber;
float gross, basic, house_rent,perks, net, incometax;
clrscr();
input:
printf("\nEnter level, job number, and basic pay\n");
printf("Enter 0 (zero) for level to End\n\n");
scanf("%d",&level);
if(level==0) goto stop;
scanf("%d %f",&jobnumber, &basic);
switch(level)
{
case 1: perks=CA1+EA1;
break;
case 2: perks=CA2+EA2;
break;
case 3: perks=CA3+EA3;
break;
case 4: perks=CA4+EA4;
break;
default: printf("Error in level code\n");
goto stop;
}
house_rent=0.25*basic;
gross=basic+house_rent+perks;
if(gross<=2000)
incometax=0;
else if(gross<=4000)
incometax=0.03*gross;
else if(gross<=5000)
incometax=0.05*gross;
else
incometax=0.08*gross;
net=gross-incometax;
printf("%d %d %.2f\n",level,jobnumber,net);
goto input;
stop: printf("\n\nEND OF THE PROGRAM");
getch();
}