typedef struct {
char *historyCommand;
int usedSize;
int maximumSize;
} HistoryArray;

void CreateHistoryArray(HistoryArray *HistoryArray) {
HistoryArray->historyCommand = (char *) malloc(sizeof(char) * MAX_LEN);
HistoryArray->usedSize = 0;
HistoryArray->maximumSize = INITIAL_SIZE;
}

void ExpandHistoryArray(HistoryArray *HistoryArray, int newSize) {
int *newArray = (char *) malloc(sizeof(char) * newSize);
memcpy(newArray, HistoryArray->historyCommand, sizeof(char) * HistoryArray->maximumSize);
free(HistoryArray->historyCommand);
HistoryArray->historyCommand = newArray;
HistoryArray->maximumSize = newSize;
}

void AddHistoryValue(HistoryArray *HistoryArray, char historyCommand[]) {
strcpy(HistoryArray->historyCommand[HistoryArray->usedSize], historyCommand);

HistoryArray->usedSize++;

if (HistoryArray->usedSize == HistoryArray->maximumSize) {
    ExpandHistoryArray(HistoryArray, HistoryArray->maximumSize * 2);
}
}

void freeHistoryArray(HistoryArray *a) {
free(a->historyCommand);
a->historyCommand = NULL;
a->usedSize = 0;
a->maximumSize = 2;
}


HistoryArray historyArray;