HW10.3

#include <stdio.h>

#define BUDGET 3
#define MONTH 12
#define UNIT 1000000

int PrintSatistic (float spend[], int n) {
    int i = 0;
    printf("> Thong ke chi tieu ca nam: \n");
    for (i = 0; i < n; ++i) {
        printf("\t+ Thang %d: %d dong\n", i+1, (int) spend[i] * UNIT);
    }
    return 0;
}

int PrintMaxMin (float spend[], int n) {
    int i, u = 0, v = 0;
    float max = spend[0], min = spend[0];
    int i_max[MONTH] = {0}, i_min[MONTH] = {0};
    i_max[u] = i_min[v] = 0;
    for (i = 1; i < n; ++i) {
        if (max < spend[i]) {
            max = spend[i];
            u = 0;
            i_max[u] = i;
        } else if (max == spend[i]) {
            ++u;
            i_max[u] = i;
        }
        if (min > spend[i]) {
            min = spend[i];
            v = 0;
            i_min[v] = i;
        } else if (min == spend[i]) {
            ++v;
            i_min[v] = i;
        }
    }
    printf("> Cac thang chi tieu nhieu nhat (%d dong):\n", (int) max * UNIT);
    for (i = 0; i < u; ++i)
        printf("%d, ", i_max[i]+1);
    printf("%d\n", i_max[i]+1);
    printf("> Cac thang chi tieu tiet kiem nhat (%d dong):\n",(int) min * UNIT);
    for (i = 0; i < v; ++i)
        printf("%d, ", i_min[i]+1);
    printf("%d\n", i_min[i]+1);
    return 0;
}

int PrintMonthRemain (float spend[], int n) {
    int i = 0;
    printf("> So tien con du sau moi thang: \n");
    for (i = 0; i < n; ++i) {
        printf("\t+ Thang %d: %d dong\n", i+1, (int) (BUDGET - spend[i]) * UNIT);
    }
    return 0;
}

int YearRemain (float spend[], int n) {
    int i = 0;
    float remain = BUDGET * MONTH;
    for (i = 0; i < n; ++i) {
        remain -= spend[i];
    }
    return remain;
}

int fInput(float min, float max) {
    int tmp, isInvalid;
    float inp;
    do {
        tmp = scanf("%f", &inp);
        while (getchar() != '\n');
        if (tmp != 1 || (inp < min || inp > max)) {
            printf("!!! Vui long nhap dung so tu %f den %f !!!\n", min, max);
            isInvalid = 1;
        } else isInvalid = 0;
    } while (isInvalid);
    return inp;
}

int Input(int min, int max) {
    int tmp, isInvalid, inp;
    do {
        tmp = scanf("%d", &inp);
        while (getchar() != '\n');
        if (tmp != 1 || (inp < min || inp > max)) {
            printf("!!! Vui long nhap dung so tu %d den %d !!!\n", min, max);
            isInvalid = 1;
        } else isInvalid = 0;
    } while (isInvalid);
    return inp;
}

int main () {
    int isOut = 0, choice, isInvalid;
    int i;
    float spend[MONTH], tmp;
    int mode = -1;  // 0 = AN TOAN, 1 = LINH HOAT

    do {
        if (mode == -1) {
            printf("\n------------------------------------------------------\n");
            printf("> Nhap che do chi tieu (0 = AN TOAN, 1 = LINH HOAT): ");
            mode = Input(0, 1);
            printf("> Nhap chi tieu cho tung thang (don vi: trieu dong):\n");
            for (i = 0; i < MONTH; ++i) {
                do {
                    isInvalid = 0;
                    printf("\t+ Thang %d: ", i+1);
                    tmp = fInput(0.0, (float) 1e6);
                    switch (mode) {
                        case 0:
                            if (tmp < 0.0 || tmp > (float) BUDGET) {
                                isInvalid = 1;
                                printf("!!! Chi tieu can nho hon %d dong !!!\n", (int) BUDGET * UNIT);
                            }
                            break;
                        case 1:
                             if (tmp < 0.0 || tmp > YearRemain(spend, i)) {
                                isInvalid = 1;
                                printf("!!! Chi tieu can nho hon %d dong !!!\n", (int) YearRemain(spend, i) * UNIT);
                             }
                             break;
                    }
                } while (isInvalid);
                spend[i] = tmp;
            }
            printf(">>> Hoan tat nhap du lieu chi tieu !\n");
            printf("------------------------------------------------------\n");
        }
        printf("\n------------------------------------------------------\n");
        printf("1. Thong ke chi tieu ca nam\n");
        printf("2. Thang chi tieu nhieu nhat/tiet kiem nhat\n");
        printf("3. So tien con du moi thang\n");
        printf("4. So tien con du sau  1 nam\n");
        printf("0. Thoat\n");
        printf("------------------------------------------------------\n");
        printf("> Nhap lua chon: ");
        choice = Input(0, 4);
        switch (choice) {
            case 1:
                printf("\n------------------------------------------------------\n");
                PrintSatistic(spend, MONTH);
                printf("------------------------------------------------------\n");
                break;
            case 2:
                printf("\n------------------------------------------------------\n");
                PrintMaxMin(spend, MONTH);
                printf("------------------------------------------------------\n");
                break;
            case 3:
                printf("\n------------------------------------------------------\n");
                PrintMonthRemain(spend, MONTH);
                printf("------------------------------------------------------\n");
                break;
            case 4:
                printf("\n------------------------------------------------------\n");
                printf("> So tien con du sau mot nam: %d\n", (int) YearRemain(spend, MONTH) * UNIT);
                printf("------------------------------------------------------\n");
                break;
            case 0:
                isOut = 1;
            default:
                printf("!!! Vui long nhap lua chon tu 0 den 4 !!!\n");
        }
    } while (!isOut);
}