View Full Version : fgets()...curious question

February 8th, 2008, 01:08 AM
I've made a program that prints 100 randomly generated numbers to a text file:

#include <stdio.h>
#include <stdlib.h>

int main()
FILE * file;
int a, i;

file = fopen("/home/alain/numbers.txt", "w");

if( file != NULL )
for(i=0; i<100; i++)
a = rand();
fprintf( file, "%d\n", a);
return 0;

What i'm wondering is if it is possible to grab all those numbers, but to assign them to their own variable, ie. num1, num2, num3...

What i was thinking of doing was fgets() all of it to a string then sscanf() each number to a variable.

now do i need to physically type out long int num1, num2, num3....
then again sscanf(stringName, "%d %d %d...(100 times)", &num1, &num2(until num100)...);


can i loop it somehow with a for loop?

Any Help Would Be Greatly Appreciated,
Thanks, Alain

February 8th, 2008, 01:10 AM
you can create a dynamic array and create a for loop to assign values with sscanf

February 8th, 2008, 01:17 AM
right..dynamically create it with malloc(), now if i wanted to add all those numbers it would be as simple as taking the array they're stored in and running it through a for loop 100 times with a long int += array...

sounds good i'll give it a try!

Thanks, Alain

February 8th, 2008, 08:55 AM
actually if its always 100 numbers then there is no need to allocate memory dinamically, but I thought since you get them from a text file you might want to have the flexiblity to change the number.

cheers mate