subtracting float from long

[AndyDoyle]

I have a small problem of subtracting a float value from a long.

When I run the program because cust bal is a float and credit limit is a long when I come to subtract one from the other it isn't working because cust bal is not bigger than credit limit
ie.
first record:-
-2407.629 - cust.cust_bal
538969064 - cust.credit_limit
second record:-
99173.45 - cust.cust_bal
538978064 - cust.credit_limit

I have to process the record if the balance exceeds the limit etc...

Can anyone see my problem?
Thanks.

 

[icrf]

You can cast variables to the same type before doing arithmatic to better predict the outcome, but I think compilers cast to the higher precision type automatically.

I don't think this answers your question. Could you post the part of code in question? ----------------------------------------------------------------------------------
...but I'm just a C man trying to see the light

 

[lionelhill]

Please post your code, but why don't you just use a float for credit limit too?

 

[RichardF]

Hi,

try this:

long CreditLimit;
float CustomerBalance;

CustomerBalance = -2407.629;
CreditLimit = 538969064;
printf("%ld\n",long(CreditLimit-CustomerBalance));

CustomerBalance = 99173.45;
CreditLimit = 538978064;
printf("%ld\n",long(CreditLimit-CustomerBalance));


Output:
538971471
538878891