list - toggle through items in a text file using c -


i have list of primes in form

p1  p2  p3  p4  p5  p6  p7 p8  p9  p10 p11 p12 p13 p14 p15 p16 p17 p18 p19 p20 p21 ....

i want write loop select each of these in succession , them (multiply them 1 of primes). not sure how go this; code far looks this

#include<stdio.h> main() {     file *fr;     fr = fopen ("primes1.txt", "rt");   }

so yeah didn't far. did before amount of data in text file small. file using contains 1 million primes. if can me out thankful!

you should able read numbers individually so:

int n; file *fp;  if ( (fp = fopen("foo.txt", "r")) == null ) {     // if file's not found     return -1; }  while ( fscanf(fp, "%d", &n) == 1 ) {     // fscanf reads next integer , skip white space, including linefeeds     // next value "n" file     // can store them in array, manipulate ones read far, etc }  fclose( fp );

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