Thread: My Assignment hv some error that i cant solve.Hope u guys can help

ok,recently ,i working on a assignment,but i cant think the solution to work on it,hope u guys can help

Code:

double const balance=20;
double curr_balance;
printf("\nWhat you want to do? To Call(1),SMS(2),TopUp(3),EXIT(4) :");    
scanf("%d",&choice);    
{   
       if (choice==1)   
 {          
  printf("\nHow long had u called?(minute) : ");   
 scanf(" %d",&minute);

 cha_rate1=minute*CHARGE1;   
 cha_rate2=(minute-10)*CHARGE2;   
 cha_rate3=(minute-20)*CHARGE3;

      if (minute < 11)
{   printf("\n==================TIME========RATE=====CHARGES\n"); 
     printf("1st Band : %3.1d.0 minutes @ RM 0.50 = RM %6.2f\n",minute,cha_rate1);  
     printf("2nt Band :   0.0 minutes @ RM 0.40 = RM   0.00\n"); 
     printf("3rd Band :   0.0 minutes @ RM 0.20 = RM   0.00\n");  
     printf("\t                             ==========\n"); 
     printf("\t     Charge for this call is RM %6.2f\n",cha_rate1);
     printf("\t                             ==========");  
     curr_balance -= balance+-cha_rate1;   
     printf("\nYour Remaining Balance is %.2f ",curr_balance);
}    
else if (choice==2)
{    int sms;
    printf("\nYou have choosen to SMS\n");   
    printf("How many SMS u want to send?");    
    scanf("%d",&sms);   
    printf("The charge rate for SMS is RM 0.10\n"); 
    printf("Total charge for %d SMS is RM %.2f\n\n",sms,sms*0.10);  
    curr_balance-=balance-(sms*0.10); 
    printf("Your Remaining Balance is %.2f",curr_balance);  
}
   }

how should combine choice 1 balance and choice 2 balance together?( i will be using loop to reapeat whole process), and sometimes need start with choice 2 first.

First, you need to work on the indentation. It helps you figure out the program structure, and we would be more inclined to help you.
SourceForge.net: Indentation - cpwiki

Also, saying "some error" doesn't help us in any way at all.
How to Report Bugs Effectively

you mean

Code:

if(choice == 1 || choice == 2)

or something else?

Originally Posted by Leon Han Jcf

how should i join the balance from choice 1 to choice 2,or choice 2 to choice 1

We have no idea how should you do something.

You should explain us what you should do. What you have tried. And in what way the result is different from what you expect. Then we will be able to show you the ways to change your approch to the better one.

Perhaps your maths is all screwed up.

Start with
double curr_balance = 20;

Then say in the first condition
curr_balance -= cha_rate1;

And the second condition
curr_balance -= (sms*0.10);


When it gets to top-up time, you use +=