How to add a character after each word in a string?

TreyZept

So what I have is the string(str) I get from fgets(str, x, stdin);. If I write for example "Hello World", I want to be able to add a character to the front of each word in the string.

Get this "Hello? World?" for example. I think I'm getting more difficult myself by trying to solve it this way:

add(char *s, char o, char c){
    int i, j = 0;
    for (i = 0; s[i] != '\0'; i++) {
        if (s[i] != o) {
            s[j] = s[i];
        }
        else {
            s[j] = c;
        }
        j++;
    }
}  

 add(str, ' ','?');
 printf("\n%s", str);

This will read "Hello? World" without spaces. Right now, the only way I've seen this work is to move everything after the first "?" one to the right while also putting the "W" in place of a space and the "?" at the end. But for longer strings I don't see myself doing this.

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

int main(void) {
    char text[] = "Hello World";

    for(char* word = strtok(text, " .,?!"); word; word = strtok(NULL, " .,?!"))
        printf("%s? ", word);

    return 0;
}

Sample output

Success #stdin #stdout 0s 4228KB
Hello? World?

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