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

void JoinStrings(char* ppszSourceStringArray[],
  int nSourceStringArrayLength, char** ppszOutput,
  int *pnOutputLength) {
    if (ppszSourceStringArray == NULL) {
        return;
    }

    if (nSourceStringArrayLength <= 0) {
      return;
    }

    if (ppszOutput == NULL) {
      return;
    }

    if (pnOutputLength == NULL) {
      return;
    }

    int nTotalBytes = 0;
    for(int i = 0;i < nSourceStringArrayLength;i++) {
      const int CURRENT_ENTRY_SIZE
        = strlen(ppszSourceStringArray[i]) + 1;
      nTotalBytes += CURRENT_ENTRY_SIZE;
      *ppszOutput = (char*)realloc(*ppszOutput,
        (nTotalBytes)*sizeof(char));
      if (i == 0) {
        memset(*ppszOutput, 0, nTotalBytes);
      }
      strcat(*ppszOutput, ppszSourceStringArray[i]);
    }
    const int FINISHED_STRING_SIZE = strlen(*ppszOutput) + 1;
    *ppszOutput = (char*)realloc(*ppszOutput,
      (FINISHED_STRING_SIZE)*sizeof(char));
    (*ppszOutput)[FINISHED_STRING_SIZE - 1] = '\0';
    *pnOutputLength = FINISHED_STRING_SIZE;
}

int main() {
  const int NUM_STRINGS = 6;

  char* strings[] = {
    "Now is the time for all good men ",
    "to come to the aid of ",
    "their country.\nAnd to the Republic ",
    "for which it stands, ",
    "one nation, under God, indivisible, with liberty ",
    "and justice for all.\n"
  };

  int nOutputLength = 0;
  char *pszOutput = NULL;
  JoinStrings(strings, NUM_STRINGS, &pszOutput, &nOutputLength);

  printf(pszOutput);

  free(pszOutput);
  pszOutput = NULL;

  memset(strings, 0, NUM_STRINGS);

  return 0;
}