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

int game(int *nb_games, int *nb_win){
    (*nb_games)++;
    // random number generated by
    // rand() which generate a random number in the range 0 to RAND_MAX
    // rand() % 128, will give the modulo of rand() per 128, number in the range 0 to 127
    // then add 1, number in the range 1 to 128.
    int number = (rand() % 128) +1, i=0, value, c=0;
    // allow no-limit number of tries by removing c<4
    while(c<4 && ++c){
        printf("Enter a value: ");
        scanf("%d", &value);
        if(value < number) printf("greater\n");
        else if(value > number) printf("lesser\n");
        else {
            printf("number found\n");
            (*nb_win)++;
            return c;
        }}
    return c;
}

int main(int argc, const char *argv[]){

    int wanna_play=0, *record, nb_games=0, nb_win=0, len=1, total_tries=0;
    char tmp[4];
    // seeding the random number generator by using unique value 'time'
    srand(time(NULL));
    record = (int*) malloc(sizeof(int));
    do {
        // add the result of game() in the record[] and the count of total_tries
        total_tries += record[len-1] = game(&nb_games, &nb_win);
        printf("game ending with %d tries\nyour ratio of wins is %f for an average number of tries of %f\ndo you want to play again ? yes/no\n", record[len-1], (float)(nb_win/nb_games), (float)(total_tries/nb_games));
        // take only 3 chars of the answer
        scanf("%3s", tmp);
        // flush the input buffer
        while(getchar() != '\n');
        if(strcmp("yes", tmp, 3)==0){
            wanna_play=1;
            // re-allocation of record[] by adding one row for storing the next game history
            record = (int*) realloc(record, sizeof(int)*++len);
        }
        else wanna_play=0;
    } while (wanna_play);

    return 0;
}