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NATHAN'S PROGRAMMING LESSONS
This page is just to give me an easy place to post some programming examples
for Nathan.
LESSON 1 - hello.bat
Example of prompting the user for some input (name and age in years) and really
roughly calculate how many months old the person is.
New Concepts:
- Variables
- Prompting for user input
- Simple arethmetic
- Echoing output
@echo off
SET /P MYNAME=Type your name here:
set /p MYAGE=Type your age (in years):
set /a MONTHS=MYAGE*12
echo hello, my name is %MYNAME% and I am %MONTHS% months old
pause
LESSON 2 - hello2.bat
Building on the previous example, we delve into tokenizing, and while the math is
still simple, we have to solve the problem of how to get the right number of
months based on birth month/year versus current month/year.
New Concepts:
- Tokenizing strings
- Calling build in functions
- Problem (real-world) solving with algorithms
@echo off
FOR /F "TOKENS=1,2 eol=/ DELIMS=/ " %%A IN ('DATE/T') DO SET mm=%%B
FOR /F "TOKENS=2,3 DELIMS=/" %%A IN ('DATE/T') DO SET yyyy=%%B
echo current month: %mm%
echo current year: %yyyy%
SET /P MYNAME=Type your name here:
set /p MYYEAR=Type the year you were born (yyyy):
set /p MYMONTH=Type the month (number) you were born (mm):
echo name: %MYNAME%
echo born: %MYMONTH% / %MYYEAR%
set /a FULLYEARS=(yyyy-1) - (MYYEAR+1)
echo FULLYEARS: %FULLYEARS%
set /a PREMONTHS = 12 - MYMONTH
echo PREMONTHS: %PREMONTHS%
set /a PLUSMONTHS = (PREMONTHS + mm)
echo PLUSMONTHS: %PLUSMONTHS%
set /a AGEINMONTHS = (FULLYEARS*12) + PLUSMONTHS
echo -------------------------------
echo ok, %MYNAME% that makes you %AGEINMONTHS% months old!
pause
LESSON 2a - tokens.bat
Now, I thought I'd give you a little sandbox to play with the parsing
@echo off
FOR /F "TOKENS=1,2 eol=/ DELIMS=/ " %%A IN ('DATE/T') DO SET mm=%%B
echo raw date:
DATE/T
echo mm: %mm%
pause
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