Re: [Dev-C++] How to add the total.......

[Daniel K. O. <dan...@ya...>]

LETCHUMANAN SAMINADAN wrote:

> I'm having a problem in in adding the total amount, my program as below...


There are some serious errors in your code; you might want to read a 
book - or at least a good tutorial - on C programming.


>     while(!feof(col))


That's not the way to read a file. Unlike Pascal, in C (and in most of 
the existing languages) I/O functions can't predict the future; feof() 
will not tell you "in the future, when you try to read from this file, 
I'll find nothing to read"; instead, it tells you "last time you tried 
to read, I reached the end-of-file". See 
http://www.eskimo.com/~scs/C-faq/q12.2.html
What you need is to test the result of the function you used to access 
the file (e.g. fscanf() will return the number of successful assignments).

---
while (fscanf(col,"%f",&data.utl)  == 1)
{
         ...
}
---

>                fscanf(col,"%f\n",&data.utl);


Always avoid using a '\n' in *scanf() calls. See 
http://www.eskimo.com/~scs/C-faq/q12.17.html

For each read operation, you might also want to accumulate the value; 
initialize a variable before the while with zero, and add the read value 
to it:

---
float total = 0;

while (fscanf(col,"%f",&data.utl)  == 1) {

               total += data.utl;
}
---


>             fflush(stdin);


You shouldn't do this; See http://www.eskimo.com/~scs/C-faq/q12.26.html



Daniel K. O.