Breakpoint in a particular case

Recently I coded up a function that wasn't working properly. I managed to find out what was wrong and fix it in a roundabout manner but I was wondering if there was an easier way. The function (stripped down) is something like this:

int func(int param)
{
  if(param == 0) return SOMETHING;
  //...
  for(int i = 0;i < 4;i++) {
    // Point A
    func(param - 1);
  }
  //...
}

I wanted to set开发者_运维问答 a breakpoint at Point A so I could see what happens for param = 10 (for example) and i = 0, 1, 2, 3 but the problem is, the function is recursive so it calls itself with (in this case) param = 9, 8,... I was wondering if there was a way to set the breakpoint for only a certain case. I used MS Visual C++ Express 2008 in this case but if there's a way to do it with another compiler (g++/gdb perhaps) then that would be helpful too.

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In Visual Studio, you can right-click the breakpoint and modify it in all kinds of ways.
Under Condition... you can specifiy your condition, like param == 10. You can even use simple C library functions for string comparision strcmp(mystr,"hi") == 0!

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The Visual Studio debugger supports conditional breakpoints. After you put a breakpoint in the editor, right click it and select "Condition..."

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In Visual Studio you can set conditional breakpoints (not sure about other environments). If you want to do this in any C++ environment ASSERT is always an option.

ASSERT(param != 10);