Thread: Capturing float value from file

Within the customers text file it says :
Account Balance = 4000.00

Code:

int main() {
    FILE * fp;
    char one[80];
    double theone;
    
    fp = fopen("customers.txt", "r");
    fgets(one, 35, fp);
    sscanf(one, "Account Balance = %f", &theone);
    printf("%f", theone);
    fclose(fp);
    return 0;
}

printf returns garbage numbers followed by lots of zeroes
Even when I use fscanf, there are also problems...

What's wrong with the code?

Pier.
[/code]

Just solved the problem using %lf instead of %f....
what the hell is the difference between using %lf and %f when reading from a file?!?!
argh... I spent two hours on this

Pier.

Sorry another similar question related to this

How do I read in a string
"DOB = 10-10-1970"
from a file and assign it to char arrays dob1, dob2 and dob3...?

this is my code

Code:

fgets(buffer, 40, fp);
sscanf(buffer, "DOB = %2c-%2c-%4c\n", custList[i].dob1, custList[i].dob2, custList[i].dob3);

It doesn't seem to work when I print them out
it gives
101019790-3233
-10-19790-3233
0-19790-3233

when I puts the three variables...

This is the text file :

Code:

Account Id = 123
Name = Matt Damon
Address = 465 Ripley Boulevard, Oscar Mansion, Singapore 7666322
DOB = 10-10-1970 
Phone Number = 790-3233
Account Balance = 405600.00

Pier.

upz

What do you mean by null terminating the strings ? What's the syntax like...
Sorry I posted the question again, but I don't seem to be able to delete the thread...

Pier.