Toss Up Dice Simulator - c

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


typedef char * string;

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

    int rolls;
    int dice_num;
    int r;
    int y;
    int i;

    int win = 0;
    int lose = 0;
    int green = 0;
    int red = 0;
    char *die;

    srand(time(NULL));

    string dice[6];

    dice[0] = "red";
    dice[1] = "yellow";
    dice[2] = "yellow";
    dice[3] = "green";
    dice[4] = "green";
    dice[5] = "green";

    if(argc < 2 ){
        printf("How many times do you want to roll?\n");
        scanf("%d", &rolls);

        printf("How many dice do you want to roll?\n");
        scanf("%d", &dice_num);
    }
    else{
        rolls = atoi(argv[1]);
        dice_num = atoi(argv[2]);
    }
    for (i=rolls;i > 0;i--){
        for (y=dice_num;y > 0;y--){
                r=rand()%6;
            die = dice[r];
            printf("%s,",die);
            if(die == "green"){
                green++;
            }
            else if(die == "red"){
                red++;
            }
        }
        //printf("green: %d\nred: %d\n",green,red);
        printf("\n");
        if( green == 0 && red > 0 ){
            lose++;
        }
        else{
            win++;
        }
        red=0;
        green=0;
    }

    printf("Wins: %d\nLoses: %d\n",win,lose);

    return 0;
}