[assert(C)]

Hello all,

Just a quick question iam getting my input from a text file by doing ./a.out <intial.txt

the input for example 1 2 3 a or 1 2 a 3

I want to be able to read all the numbers in and when I get to a store that in my array as zero. Here is the code I have so far

int array[100];
int number;
int count=0;
while (scanf("%d",&number)==1){
     array[count]=number;
     count++;
}

This is in C

[jimblumberg]

You will have a couple of problems with your code. First your loop will exit when it comes across the non-number value of 'a', because scanf will not return 1, it will return eof (usually -1). The other problem will be, you will need to properly clear the error before you can use the input stream again.

You would probably be better off using fgets() to retrieve the entire line into a C-string then use sscanf() to retrieve the individual elements.

Quote

I want to be able to read all the numbers in and when I get to a store that in my array as zero. Here is the code I have so far

What do you want to happen to the numbers that are after your 'a'?

Jim

[assert(C)]

Still store them but store a as 0

Yeah I could use fgets and sscanf but it will be harder is there anyother way I cant set a flag also cause if it reaches a it will terminate

[jimblumberg]

Why don't you use zero for zero?

Jim

[assert(C)]

yeah Its a task I need to use a

[jimblumberg]

Please explain what you are actually trying to accomplish in more detail.

Are the "numbers" all a single digit (less than 10)?

Jim

[assert(C)]

Um the numbers are single digits and they are stored in array of ints and a is read in the input it should be stored in the array as zero.

[jimblumberg]

Since every "number" is a single digit then instead of using scanf to input numbers input characters, check each character if it is an 'a' store zero, otherwise convert the character to a number and store that, be sure you skip leading white space.

Jim

[assert(C)]

Hmm thats fine but how will The program now its end of the text file

[jimblumberg]

When scanf(), or fgets() detect the end of file.

Jim

[assert(C)]

Does it require me to open the file up using fopen cause I am redirecting the file

[jimblumberg]

With the command ./a.out <intial.txt you are redirecting the standard input file from the console to the supplied file. The standard input file is automatically opened by your program. You do not need to open any file to do this.

Jim