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Can someone explain this code to me please - Printable Version

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Can someone explain this code to me please - aKnoxx - 27.12.2018

PHP код:
     new f = MAX_OBJ+1;
     for(new a = 0; a < MAX_OBJ; a++) 
PHP код:
     new str[128], i;
     for (i = 0; i < strlen(str); i++) if (str[i] == '_') str[i] = ' '; 
What I understand:

1st one:
f = MAX OBJECTS + 1
a = MAX OBJECTS


2nd one:
i = length of str
if str[i] has a _ replace it with a SPACE

Is that right? Or am I missing something?

And what would these be used for? Why would someone want to use these?

Because from what I can see "a" basically equals "MAX_OBJ" so why would someone want to use "a" instead of "MAX_OBJ"? And if they did want to use "a" instead why not just do this:

PHP код:
new a = MAX_OBJ; 
Thank you I'm new to scripting, just curious.