crear programa numerico con este

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

FILE* programa;

int main()
{
    char prog[]="\\programa.c";
    int n1=0,n2,c=0;
    scanf("%i",&n2);
    if (n2<0)
        n2=-n2;
    programa=fopen(prog,"wt");
    fclose(programa);
    programa=fopen(prog,"at");
    fprintf(programa,"#include <stdio.h>\n");
    fprintf(programa,"int main ()\n");
    fprintf(programa,"{\n\t");
    while (n1!=n2)
    {
        fprintf(programa,"printf(\"%i\\t\");\n\t",n1);
        n1=n1+1;
        c=c+1;
        if (c==5)
        {
            c=0;
            fprintf(programa,"printf(\"\\n\");\n\t");
        }
    }
    fprintf(programa,"return 0;}");
    fclose(programa);
    return 0;
}