manipulating strings

[slee8251]

I am writing a program where the user inputs a string and have to make the string "dance" based on a rhythm they also input.

rhythm 2 : *_*_*_*_ etc.. (where star is capitalized and _ is lower case)

This is my code so far:

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

int main (void)
{
    char line[100];
    int rythym;
    
    char *p;
    int k =0 ;



    printf("Enter a string:");
    gets(line);
    
    printf("Enter a rythym:");
    scanf("%d", &rythym);

    printf("Original String: %s\n", line);

    for (p = line; *p != '\0'; p++)
    {
       *p = toupper(*p); 
    }

    while(line[k] != '\0')
    {
        if(rythym == 2)
        {
            line[k] = tolower(line[k]);
            
            k+= rythym;
        }    
    
    }

    printf("After rythym applied: %s\n\n", line);

return 0;
}

Output:
Enter a string:Hello World make me dance
Enter a rythym:2
Original String: Hello World make me dance
After rythym applied: hElLo wOrLd mAkE Me dAnCe

I still have two things to address:

I need the first word to always be capitalized and I also need to not count whitespaces for the rhythm.

So my output needs to look like this:
"HeLlO wOrLd MaKe Me DaNcE"

I have an idea as to how to make the first word always capitalized but I need tips or advice on not applying the rythym for whitespace.

Thanks so much in advance

[whiteflags]

All you have to do is start k at 1 instead of 0. If you keep incrementing by the rythym, like you do, it should ensure that all the lower case characters are in odd elements of the string, which is what you want. Because you are using an increment of 2, I would also change the loop condition to make sure that k stays less than the size of the string: k must not exceed the size of the string. You would only end up at the terminating zero when the string is an even size.

There is an isspace function so that you don't apply the rule on space characters.

Also, beware of gets. FAQ > Why gets() is bad / Buffer Overflows - Cprogramming.com