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| Line 12: | Line 12: | ||
int f; | int f; | ||
cin >> f; | cin >> f; | ||
char a | char a[20]; | ||
for (int i = 0; ; i++) | for (int i = 0; ; i++) | ||
{ | { | ||
| Line 22: | Line 22: | ||
for (int d=0;d<c;d++) | for (int d=0;d<c;d++) | ||
{ | { | ||
cout << (char)(a | cout << (char)(a[d]+f); | ||
fout << (char)(a | fout << (char)(a[d]+f); | ||
} | } | ||
cout << endl; | cout << endl; | ||
| Line 44: | Line 44: | ||
int f; | int f; | ||
cin >> f; | cin >> f; | ||
char a | char a[20]; | ||
for (int i = 0; ; i++) | for (int i = 0; ; i++) | ||
{ | { | ||
| Line 53: | Line 53: | ||
for (int d=0;d<c;d++) | for (int d=0;d<c;d++) | ||
{ | { | ||
cout << (char)(a | cout << (char)(a[d]-f); | ||
fout << (char)(a | fout << (char)(a[d]-f); | ||
} | } | ||
cout << endl; | cout << endl; | ||
| Line 62: | Line 62: | ||
return 0; | return 0; | ||
} | } | ||
Latest revision as of 00:44, 27 March 2026
암호화
#include <fstream>
#include <iostream>
#include <stdlib.h>
using namespace std;
int main()
{
ifstream fin("input.txt"); // fin과 input.txt를 연결
ofstream fout("output.txt"); // fout과 output.txt를 연결
cout << "숫자 입력> ";
int f;
cin >> f;
char a[20];
for (int i = 0; ; i++)
{
fin.getline(a,20);
if (fin.eof())
break;
int c = strlen(a);
for (int d=0;d<c;d++)
{
cout << (char)(a[d]+f);
fout << (char)(a[d]+f);
}
cout << endl;
fout << endl;
}
cout << endl;
return 0;
}
복호화
#include <fstream>
#include <iostream>
#include <stdlib.h>
using namespace std;
int main()
{
ifstream fin("output.txt"); // fin과 input.txt를 연결
ofstream fout("output2.txt"); // fout과 output.txt를 연결
cout << "숫자 입력> ";
int f;
cin >> f;
char a[20];
for (int i = 0; ; i++)
{
fin.getline(a,20);
if (fin.eof())
break;
int c = strlen(a);
for (int d=0;d<c;d++)
{
cout << (char)(a[d]-f);
fout << (char)(a[d]-f);
}
cout << endl;
fout << endl;
}
cout << endl;
return 0;
}