p0411.c

#include <stdio.h>
#include <stdlib.h>
#define X_MAX 70
#define Y_MAX 40
#define UFO_LENGTH 5

void p1() {
    printf("====1====\n");
    system("timeout 3 > NULL");

    int num;

    do {
        printf("짝수 입력 때까지 반복: ");
        scanf("%d", &num);
    } while (num % 2 != 0);

    printf("%d는 짝수\n", num);
}

void p2() {
    system("cls");
    system("timeout 3 > NULL");
    printf("====2====\n");
    system("timeout 3 > NULL");

    for (int i = 0; i < 70; i++) {
        system("cls");
        if (i % 2 == 0) {
            printf("\n");
        }
        for (int j = 0; j < i; j++) {
            printf(" ");
        }
        printf("<#=#>\n");
        //system("timeout 1 > NULL");
    }
}

void p3() {
    system("cls");
    system("timeout 3 > NULL");
    printf("====3====\n");
    system("timeout 3 > NULL");

    for (int i = 0; i < 140; i++) {
        system("cls");
        if (i % 2 == 0) {
            printf("\n");
        }
        if (i < 70) {
            for (int j = 0; j < i; j++) {
                printf(" ");
            }
        } else {
            for (int j = 0; j < 140 - i; j++) {
                printf(" ");
            }
        }
        
        printf("<#=#>\n");
        //system("timeout 1 > NULL");
    }
}

void p4() {
    system("cls");
    system("timeout 3 > NULL");
    printf("====4====\n");
    system("timeout 3 > NULL");

    for (int i = 0; i < 26; i++) {
        system("cls");
        
        for (int j = 0; j < i; j++) {
            printf("\n");
        }

        if (i % 2 == 0) {
            printf("     ");
        }
        
        printf("<#=#>\n");
        system("timeout 1 > NULL");
    }
}

void p5() {
    system("cls");
    system("timeout 3 > NULL");
    printf("====5====\n");
    system("timeout 3 > NULL");

    int x, y;

    for (int cnt = 0; cnt < 70; cnt++) {
        system("cls");

        x = rand() * (X_MAX - UFO_LENGTH) / (RAND_MAX + 1);
        y = rand() * (Y_MAX - 1) / (RAND_MAX + 1);

        //printf("%d %d", x, y);

        for (int dy = 0; dy < y; dy++) {
            printf("\n");
        }

        for (int dx = 0; dx < x; dx++) {
            printf(" ");
        }

        printf("<#=#>");
        system("timeout 1 > NULL");
    }
}

void p6() {
    int min, sec;
    printf("분 초 입력: ");
    scanf("%d %d", &min, &sec);
    for (; min >= 0; min--) { // for: 분(min)을 계산 
        for (; sec >= 0; sec--) { // for: 초(sec)를 계산 
            system("cls"); // 화면 지우기
            printf("%d분 : %d초\n", min, sec);
            system("timeout 1 > NULL"); // 1초 멈추기
        }
        sec = 59; // 새로운 1분 시작
    } // End of for min
    printf("그만 튀겨!\n");
}


int main() {
    /**
    for (int i = 2; i < 10; i++) {
        printf("%d dan: ", i);
        for (int j = 1; j < 10; j++) {
            printf("%dx%d=%d ", i, j, i*j);
        }
        printf("\n");
    }*/

    /**
    p1();
    p2();
    p3();
    p4();
    p5();
    */
    printf("hello\n");
    p6();
    return 0;
}