Write a C program that calculates and prints the bill for a

Write a C program that calculates and prints the bill for a cellular telephone company. The company offers two types of services: regular and premium. Its rates vary depending on thetype of service. The rates are computed as follows:Regular service: $10.00 plus first 50 minutes are free. Charges for over than 50 minutes are $0.20 per minute.Premium service: $25.00 plus:a. For calls made from 6:00 A.M. to 6:00 P.M., the first 75minutes are free; chargesfor more than75 minutes are $0.10 per minute. b. For calls made from 6:00 P.M. to 6:00 A.M., the first 100 minutes are free; chargesfor over 100 minutes are $0.05 per minute.Your program should prompt the user to enter an account number, a service code (type char) and the number of minutes the service was used. A service code of r or R means regular service; a service code of p or P means premium service. Treat any other character as an error. Your program should output the account number, type of service, number of minutes the telephone service was used, and the amount due from the userand it should report any errors.For the premium service, the customer may be using the service during the day and the night. Therefore, to calculate the bill, you must ask the user to input the number of minutes the service was used during the day and the number of minutes the service was used during the night. use if statements and while statements

Solution

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
void user_detail(char ac[],char st,float m)
{
   printf(\"\ \");
   printf(\"\ \");
   printf(\"\ \");
   printf(\"\ *****************************************\ \");
   printf(\"\ Bill Detail For Account Number: \\t\");
   puts(ac);
   if((st==\'r\')||(st==\'R\'))
   {
       printf(\"Service you Have Used is: Regular\\t \ \");
   }  
   if((st==\'p\')||(st==\'P\'))
   {
       printf(\"Service you Have Used is: Premium \\t \ \");
   }  
   printf(\"Total Minutes you Have Used is :%f\\t \ \",m);
}
int main()
{
   float marks;
   //int c;
   char st;
   char ac[15];
   float m,tc,m1;
   int du;
       while(1)
   {
   printf(\"please Enter The below Detail For Bill\");
   printf(\"Your Account Number\");
   gets(ac);
   printf(\"Your Service Type..\");
   printf(\"for Regular Press R or r\");
   printf(\"for Premier Press P or p\");
   scanf(\"%c\",&st);
   printf(\"Enter The number of minutes the service was used\");
   scanf(\"%f\",&m);
   printf(\"************************************************* \ \");
       switch(st)
       {
           case \'R\' :
           case \'r\' :
                   if(m>50)
                   {
                       m1=m-50;
                       tc=((m1*0.20)+10);
                       user_detail(ac,st,m);
                       printf(\"And The Bill is %f$\",tc);
                       printf(\"\ *************************************************\");
                   }
                   else
                   {
                       tc=((m*0.20)+10);
                       user_detail(ac,st,m);
                       printf(\"And The Bill is %f$\",tc);
                       printf(\"\ *************************************************\");
                   }

                   exit(1);
           case \'p\' :
           case \'P\' :
               printf(\"Press 1 for using timing between 6:00 A.M. to 6:00 P.M \");
                   printf(\"or\");
                   printf(\"Press 2 for using timing between 6:00 P.M. to 6:00 A.M \");
                   scanf(\"%d\",&du);
                   if(du==1)
                   {
                       if(m>75)
                       {
                       m1=m-75;
                       tc=((m1*0.10)+25);
                       user_detail(ac,st,m);
                           printf(\"And The Bill is %f$\",tc);
                           printf(\"\ *************************************************\");
                       //   exit(1);
                       }
                       else
                       {
                           tc=((m*0.10)+25);
                           user_detail(ac,st,m);
                           printf(\"And The Bill is %f$\",tc);
                           printf(\"\ *************************************************\");
                       //   exit(1);
                           }
                   }
                   if(du==2)
                   {
                       if(m>100)
                       {
                       m1=m-100;
                       tc=((m1*0.05)+25);
                       user_detail(ac,st,m);
                           printf(\"And The Bill is %f$\",tc);
                           printf(\"\ *************************************************\");
                           // exit(1);
                       }
                       else
                       {
                           tc=((m*0.10)+25);
                           user_detail(ac,st,m);
                           printf(\"And The Bill is %f$\",tc);
                           printf(\"\ *************************************************\");
                           // exit(1);
                           }
                   }
                   exit(1);
               default:
                   printf(\"You have Entered Wrong Service Type!!!\");
                  exit(1);
       }
   }
}