#include <stdio.h>
#define rate1 4.50
#define rate2 8.35
#define rate3 11.00
#define rate4 20.00
#define tax300 0.15
#define tax150 0.20
#define taxall 0.25

void starline(void);
float gross(float,float);
float taxpay(float);

int main(){

float hours,grosspay,Tax;
int rateno;

starline();
printf("\n\nEnter the number corresponding to the desired pay rate\n\n");
printf("1 - %c4.50/hr                             2 - %c8.35/hr\n",156,156);
printf("3 - %c11.00/hr                            4 - %c20.00/hr\n",156,156);
starline();
printf("\n\n");
scanf("%d",&rateno);
printf("\n\nPlease enter the number of hours per week worked: \n\n");
scanf("%f",&hours);

switch(rateno){
case 1 :  grosspay = gross(hours, rate1);
break;
case 2 :  grosspay = gross(hours, rate2);
break;
case 3 :  grosspay = gross(hours, rate3);
break;
case 4 :  grosspay = gross(hours, rate4);
break;
default : printf("Incorrect Entry for rate choice, values 1 to 4 only\n\n");
system("pause");
system("cls");
main();
}

printf("\n\nThank you\n\n");
system("pause");
printf("\n\nGross pay for %.2f hours worked:  %c%.2f\n\n",hours,156,grosspay);
Tax = taxpay(grosspay);
printf("Tax for this amount: %c%.2f\n\n",156,Tax);
grosspay -= Tax;
printf("Net pay: %c%.2f\n\n",156,grosspay);
system("pause");
      return 0;
}

void starline(void){
int i;
for(i=0;i<61;i++){
printf("%c",42);
}}

float gross(float Hours, float Rate){
float g_pay = 0.0;
if(Hours>40.0){
     g_pay = 40.0 * Rate;
     Hours -= 40.0;
     g_pay +=(1.5 * Rate * Hours);
     }
else{
     g_pay += (Rate * Hours);
     }
return g_pay;
}

float taxpay(float g_pay){
float Tax = 0.0;
if(g_pay<300){
    Tax += g_pay * tax300;
    g_pay = 0.0;
}
else{
    Tax = 300 * tax300;
    g_pay -= 300;
}
if(g_pay<150){
    Tax += g_pay * tax150;
    g_pay = 0;
}
else{
    Tax += 150 * tax150;
    g_pay -= 150;
}
if(g_pay>0.0){
    Tax += (g_pay * taxall);
}
return Tax;
}