method for expand a-z to abc…xyz form

Question

Hi:) what i\'m trying to do is write a simple program to expand from shortest entry

for example

a-z or 0-9 or a-b-c or a-z0-9

Answer 1

Ok I tested your program out and it seems to be working for nearly every case. It correctly expands a-z and other expansions with only two letters/numbers. It fails when there are more letters and numbers. The fix is easy, just make a new char to keep the last printed character, if the currently printed character matches the last one skip it. The a-z0-9 scenario didn't work because you forgot a s[i] >= '0' instead of s[i] > '0'. the code is:

#include 
#include 

void expand(char s[])
{
        int i,g,n,c,l;
    n=c=0;
    int len = strlen(s);
    for(i = 1;s[i] >= '0' && s[i]<= '9' || s[i] >= 'a' && s[i] <= 'z' || s[i]=='-';i++)
    {
        c = s[i-1];
        g = s[i];
        n = s[i+1];
        //printf("\nc = %c g = %c n = %c\n", c,g,n);
        if(s[0] == '-')
            printf("%c",s[0]);
        else if(g == '-')
        {
            if(c

Isn't this problem from K&R? I think I saw it there. Anyway I hope I helped.