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


int main()
{
    FILE *pf1,*pf2;
    int a;

    pf1=fopen("file1.txt","r");

    pf2=fopen("file2.txt","w");

    if(pf1)
    {
        do{
            a=fgetc(pf1);
            if(isgraph(a)) fputc(a,pf2);
        }while(a!=EOF);
    }


    fclose(pf1);
    fclose(pf2);



    return 0;
}