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Add extern notes to C.

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Levi Bostian 2013-08-31 19:24:15 -05:00
parent d632203255
commit 8caf3768fb
1 changed files with 7 additions and 1 deletions
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8
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@ -99,7 +99,7 @@ int main() {
unsigned int ux_int; unsigned int ux_int;
unsigned long long ux_long_long; unsigned long long ux_long_long;
// chars inside single quotes '*' are ASCII versions of // chars inside single quotes '*' are character constants.
'0' //==> 48 on the ASCII table. '0' //==> 48 on the ASCII table.
'A' //==> 65 on the ASCII table. 'A' //==> 65 on the ASCII table.
@ -472,6 +472,12 @@ while ((c = getchar()) != EOF) { // EOF constant "end of file".
char c = getchar(); char c = getchar();
} }
//if referring to external variables outside function, must use extern keyword.
int i = 0;
void testFunc() {
extern int i; //i here is now using external variable i
}
/* /*
char c[] = "This is a test."; char c[] = "This is a test.";
str_reverse(c); str_reverse(c);