C/Academy

마지막 문제

갈릭새우칩 2019. 7. 4. 21:51
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#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
 
char EncTable[26][26] = {};
 
struct Date
{
    int year = 0;
    int month = 0;
    int day = 0;
};
 
void StringFunc()
{
    const char * Str = "Hello World!";
 
    int index = strlen(Str);
 
    for (int i = index; i >= 0; i--)
    {
        if (Str[i] != NULL)
            printf("%c", Str[i]);
    }
 
}
 
void PtrFunc()
{
    int * ary;
 
    int InputNum = 0;
 
    scanf("%d", &InputNum);
    ary = (int*)malloc(InputNum * sizeof(int));
 
    for (int i = 0; i < InputNum; i++)
    {
        ary[i] = rand();
    }
 
    for (int i = 0; i < InputNum; i++)
    {
        printf("%d ", ary[i]);
    }
}
 
void StructFunc()
{
    Date day1;
    Date day2;
    Date RecentDay;
    printf("첫번째 날짜를 입력하세요! ");
    scanf("%d %d %d", &day1.year, &day1.month, &day1.day);
    printf("두번째 날짜를 입력하세요! ");
    scanf("%d %d %d", &day2.year, &day2.month, &day2.day);
 
    if (day1.year > day2.year)
    {
        RecentDay.year = day1.year;
        RecentDay.month = day1.month;
        RecentDay.day = day1.day;
    }
    else if (day1.year < day2.year)
    {
        RecentDay.year = day2.year;
        RecentDay.month = day2.month;
        RecentDay.day = day2.day;
    }
    else
    {
        if (day1.month > day2.month)
        {
            RecentDay.year = day1.year;
            RecentDay.month = day1.month;
            RecentDay.day = day1.day;
        }
        else if (day1.month < day2.month)
        {
            RecentDay.year = day2.year;
            RecentDay.month = day2.month;
            RecentDay.day = day2.day;
        }
        else
        {
            if (day1.day > day2.day)
            {
                RecentDay.year = day1.year;
                RecentDay.month = day1.month;
                RecentDay.day = day1.day;
            }
            else if (day1.day < day2.day)
            {
                RecentDay.year = day2.year;
                RecentDay.month = day2.month;
                RecentDay.day = day2.day;
            }
            else
            {
                //
            }
        }
    }
 
    printf("%d %d %d이 더 최신입니다.", RecentDay.year, RecentDay.month, RecentDay.day);
}
 
void Encryption(char str[])
{
    printf("%s\n", str);
    printf("암호화...\n");
 
    for (int i = 0; i < strlen(str); i++)
    {
        str[i] += 3;
    }
 
    printf("%s", str);
}
 
void Decryption(char str[])
{
    printf("\n복호화..\n");
    for (int i = 0; i < strlen(str); i++)
    {
        str[i] -= 3;
    }
 
    printf("%s\n", str);
}
 
 
int main(void)
{
    char Test[100];
    srand(time(NULL));
    //StringFunc();
    //PtrFunc();
    //StructFunc();
 
 
    printf("암호화할 문자를 입력하세요 ");
    scanf("%[^\n]", &Test);
    Encryption(Test);
    Decryption(Test);
 
    return 0;
}
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