Windows批处理文件：如何将命令行参数与整数进行比较

Question

I am only very new to batch file programming and I have tried to find the solution online, but failed. My batch file calls ac program passing it's own command line arguments to the program then does subsequent steps which depend on the value of the fourth argument (which is an integer). I would like to do an extra step in my batch file if %4 is equal to 3. I have placed some echo test statements. But only the "testno" gets printed even if I enter 3 as my fourth argument.

---

Batch file name: p2debug1234.bat

---

Batch file code:

---

@echo off
@setlocal 
p2task1 %1 %2 %3 %4
start mi_viewer %1
start mi_viewer %2
echo %4
echo 3
If ("%4"== "3") (echo testyes) Else (echo testno)
echo testif

---

Command prompt snapshot:

---

H:\ELEC4622\labs\data>p2debug1234 pens_rgb.bmp test.bmp 2 3

3
3
testno
testif

---

Please help me make a valid comparison.

Best Regards, Julia

Answer 1

Change line:

If ("%4"== "3") (echo testyes) Else (echo testno)

to:

If "%4"=="3" (echo testyes) Else (echo testno)