Multiple variable rules in for() statement
Multiple variable rules in for() statement
- Subject: Multiple variable rules in for() statement
- From: Jonathon Kuo <email@hidden>
- Date: Thu, 12 Nov 2009 11:29:04 -0800
I can't chance upon the right incantation for using both an existing
variable and an inline new one in a for loop. I've boiled this down to
a trivial show case, same results for both gcc 4.0.1 and 4.2.1:
int i;
. . .
for (i=0, int m=0; i<5; i++) { . . . };
printf("Final value of i: %d\n",i);
error: syntax error before ‘int’
error: syntax error before ‘)’ token
So I tried this:
int i;
. . .
for (int m=0,i=0; i<5; i++) { . . . };
printf("Final value of i: %d\n",i);
error: redefinition of ‘i’
Is there a rule that ALL initialized loop variables are either new and
local to the loop, or that none are? Surely Im doing something wrong
here!
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