puncuationreverse.c

#include <stdio.h>
#include "cs50.h"
#define S_BUFFER 20
#define L_BUFFER 900

int words(const char sentence[ ])
{
    int counted = 0; // result

    // state:
    const char* it = sentence;
    int inword = 0;

    do switch(*it) {
        case '\0':
        case ' ': case '\t': case '\n': case '\r': // TODO others?
            if (inword) { inword = 0; counted++; }
            break;
        default: inword = 1;
    } while(*it++);

    return counted;
}


void reverse(char in[])
{
    int i;
    int j;
    char out[strlen(in)];
    for (i = 0, j = strlen(in) - 1; i < strlen(in); i++, j--){
        out[i] = in[j];
    }
    out[i] = '\0';
    strcpy(in, out);
}

void split(char input[]){
    char end_delimiter[] = {' ', '\0'};
    strcat(input, end_delimiter);
    char wordArray[words(input)][L_BUFFER];
    int wordCount = 0;
    int i;
    int j;
    char temp[S_BUFFER];
    for (i = 0, j = 0; i < strlen(input); i++){
        if (input[i] == ' ' || ispunct(input[i])){
            temp[j] = '\0';
            reverse(temp);
            if (ispunct(input[i])) {
                char fucked[] = {input[i], '\0'};
                strcat(temp, fucked);
                i++;
            }
            //Copy to matrix here
            strcpy(wordArray[wordCount], temp);
            wordCount++;
            j = 0;
            strcpy(temp, "");
        } else {
            temp[j] = input[i];
            j++;
        }
    }

    int index = 0;
    for (index = 0; index < wordCount; index++){
        puts(wordArray[index]);
    }
}

int main(void)
{
    string in = GetString();
    char content[L_BUFFER];
    strcpy(content, in);
    split(content);
}