/***************************************************
Simple Checkbook version 1
Katie Rivard
Simple user input/output practice
***************************************************/

#include
#include

#define __NO_WIDE_CHAR

int getcommand();
int alterbalance(int commandnum);
int getbalance();

main()
{
long double balance; int commandnum; /*number of the command*/
int i=1;

balance=getbalance(); /*gets beginning balance*/

sortnums: /*goto label*/
while(i)
{
commandnum=getcommand(); /*gets command (withdrawl/deposit/etc)*/
switch(commandnum)
{
case 1: /*fallthrough*/
case 2: balance=+alterbalance(commandnum); /*deposit(1) or withdraw(2)*/
printf("\nBalance:\t%.2lf\n", balance);
break;
case 3: printf("This ends your checkbook session.\n"); /*quit*/
i=0;
break;
case 4: printf("\nCheckbook Help: Commands\ndeposit (value)\t\td (value)\tDeposits the value into your balance.\n"); /*help*/
printf("withdrawl (value)\tw (value)\tTakes value out of your balance.\n");
printf("new (value)\tn (value)\tNew balance: Enter a new balance.\n");
printf("help\t\th\tView this text.\nquit\t\tq\tEnds your checkbook session.\n");
break;
case 99: goto sortnums; /*allow invalid commands*/
break;
}

}
return 0;
}



int getbalance() /*getbalance(): gets balance*/
{
long double balancenum;
printf("Enter your balance:\n");
scanf("%lf", &balancenum);
printf("Balance=\t%.2lf\n", balancenum);
return balancenum;
}



int getcommand() /*getcommand(): gets a number according to what the user enters; 1 for deposit, 2 for withdrawl, 3, 4, etc.*/
{
char command[100];

printf("\nEnter a command, or h for help:\n");
scanf("%s", &command);

if (command[0]=='d') /*checks the first letter of the word the user enters-- Deposit/1*/
return 1;
else if(command[0]=='w') /*Withdrawl/2*/
return 2;
else if(command[0]=='q') /*Quit/3*/
return 3;
else if(command[0]=='h') /*Help/4*/
return4;
else if(command[0]=='n') /*New balance/5*/
return 5;
else /*invalid/99*/
{
printf("Invalid command.\n");
return 99;
}
}



int alterbalance(commandnum) /*alterbalance(): returns a negative value for withdrawls, positive for deposits, depending on command.*/
{
double amount;
scanf("%lf", &amount);
if(commandnum)
return amount;
else
return -amount;
}

/**********************************************************end*/


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