NCTU LAB 04/12 Num 3

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

int gcd(int a, int b){
    if(a==0){
        return b;
    }
    return gcd(b%a, a);
}

int max(int a, int b, int c, int d){
    if(a>=b && a>=c && a>=d){
        return a;
    }
    if(b>=a && b>=c && b>=d){
        return b;
    }
    if(c>=a && c>=b && c>=d){
        return c;
    }
    return d;
}

int min(int a, int b, int c, int d){
    if(a<=b && a<=c && a<=d){
        return a;
    }
    if(b<=a && b<=c && b<=d){
        return b;
    }
    if(c<=a && c<=a && c<=d){
        return c;
    }
    return d;
}


void show(int espresso, int milk, int chocolate, int froth){
    printf("Espresso: %d\n", espresso);
    printf("Milk: %d\n", milk);
    printf("Chocolate: %d\n", chocolate);
    printf("Froth: %d\n", froth);
}

void add(int *espresso, int *milk, int *chocolate, int *froth, int supply_espresso, int supply_milk, int supply_chocolate, int supply_froth){
    *espresso+=supply_espresso;
    *milk+=supply_milk;
    *chocolate+=supply_chocolate;
    *froth+=supply_froth;
}

bool make(int *espresso, int *milk, int *chocolate, int *froth, int r0 ,int r1 ,int r2 ,int r3 ,int *output){
    int hcm = gcd(r0,gcd(r1,gcd(r2,r3)));
    r0 = (r0==0?r0:r0/hcm);
    r1 = (r1==0?r1:r1/hcm);
    r2 = (r2==0?r2:r2/hcm);
    r3 = (r3==0?r3:r3/hcm);
    int maxR = max(r0, r1, r2, r3);
    int a,b,c,d;
    a = (*espresso/maxR==0?9999:*espresso/maxR);
    b = (*milk/maxR==0?9999:*milk/maxR);
    c = (*chocolate/maxR==0?9999:*chocolate/maxR);
    d = (*froth/maxR==0?9999:*froth/maxR);
    int minI = min(a,b,c,d);
    if(*espresso-minI*r0<0 || *milk-minI*r1<0 || *chocolate-minI*r2<0 || *froth-minI*r3<0){
        return false;
    }
    int dif = minI*r0 + minI*r1 + minI*r2 + minI*r3;
    *espresso-=minI*r0;
    *milk-=minI*r1;
    *chocolate-=minI*r2;
    *froth-=minI*r3;
    *output = dif;
    return true;
}

int main(){
    int espresso=0, milk=0, chocolate=0, froth=0, option, opt, out;
    int re, rm, rc, rf;
    int addE, addM, addC, addF;
    char cnt = 'y';
    do{
        system("cls");
        show(espresso, milk, chocolate, froth);
        printf("1. Add ingredient\n");
        printf("2. Make coffee\n");
        printf("Choose option: ");
        scanf("%d", &option);
        switch(option){
            case 1:
                printf("Input increased volume(in order of espresso, milk, chocolate, froth)\n");
                scanf("%d %d %d %d", &addE, &addM, &addC, &addF);
                add(&espresso, &milk, &chocolate, &froth, addE, addM, addC, addF);
                break;
            case 2:
                printf("1. Latte\n");
                printf("2. Cappuccino\n");
                printf("3. Mocha\n");
                printf("4. User define\n");
                scanf("%d", &opt);
                switch(opt){
                    case 1:
                        if(make(&espresso, &milk, &chocolate, &froth, 3, 3, 0, 4, &out)){
                            printf("Congratulations! you make %d ml Latte\n", out);
                        }else{
                            printf("Ingredients are not enough\n");
                        }
                        break;
                    case 2:
                        if(make(&espresso, &milk, &chocolate, &froth, 7, 3, 0, 5, &out)){
                            printf("Congratulations! you make %d ml Cappuccino\n", out);
                        }else{
                            printf("Ingredients are not enough\n");
                        }
                        break;
                    case 3:
                        if(make(&espresso, &milk, &chocolate, &froth, 3, 1, 1, 0, &out)){
                            printf("Congratulations! you make %d ml Mocha\n", out);
                        }else{
                            printf("Ingredients are not enough\n");
                        }
                        break;
                    case 4:
                        printf("Input ratio<in order of espresso, milk, chocolate, froth\n");
                        scanf("%d %d %d %d", &re, &rm, &rc, &rf);
                        if(make(&espresso, &milk, &chocolate, &froth, re, rm, rc, rf, &out)){
                            printf("Congratulations! you make %d ml defined coffee\n", out);
                        }else{
                            printf("Ingredients are not enough\n");
                        }
                        break;
                }
                break;
        }
        printf("Continue?(y/n): ");
        scanf(" %c", &cnt);
    }while(cnt!='n');
    printf("Thank you for using coffee maker!");
    return 0;
}