[soulfly]

Hello everyone.

I have a question regarding FILE I/O in c.
I have a text file that contains numbers
like this:
(---in the text file----)
1 22 4

what i want to do is to read the numbers in stored in that text file as "integer"
not as string and then use arithmetic operators (+, -, *, /) on those numbers. usually when I read numbers from a text file, it doesn't recognizes it as integer (it still treat the numbers from the text file as char).

here is the code that i've written

FILE *fp;
int a, b, c;
int i = 0;
int d;
int nums[100];
int num[100];
int temps[100];
if ((fp = fopen("new.txt", "r")) == NULL)
fprintf(stderr, "CANNOT OPEN FILE", "new.txt");
else
{
while ((fscanf(fp, "%d", nums)) != EOF);
{
fclose(fp);
fp = fopen("new.txt", "r");
while((nums[i] = fgetc(fp)) != EOF) {
if ((i %2) == 0)
{
temps[i] = nums[i];
}

i++;
}

}
}

what i want to know is how can i assign the value of temp[i] to an integer number. when i try to pass the value of temp[i] to an integer variable, the passed value from temp[i] to int is still read as character.
I did this program just to know how can i compute numbers that was read from a file.

any help is highly appreciated.

[AGCurry]

I'm not sure what you're trying to do.

But: If you're reading from a text file, and you want numbers, you will have to convert those characters and/or character strings to numbers (int, float, or double).

Your fscanf loop has a problem, in that it makes no allowance for white space between the numbers. Your fgetc() loop has a problem in that it reads one character at a time, not one number at a time. And, yes, a space character DOES have a numeric value, and the character '2' does not have the numeric value 2.

So, you must do two things: PARSE the numeric strings from the input, and CONVERT them to actual numeric datatypes.

OR, you can create a binary file to use as your input...