Declaring Strings

Fri, 06 May 2011 02:23:37 -0700

I can write char a[] = "hello world"; , but i can not write
char a[];
a = "hello world";
why so?

Re: Declaring Strings

Fri, 06 May 2011 10:30:26 -0700

char a[] = "hello world";

you can that because the compiler knows how much space to allocate for the string "hello world."

char a[];
a = "hello world";

C won't allow aggregate assignment; you've got an array of chars and a string, which aren't exactly the same thing. you've also got an unknown size - the compiler doesn't know much space to allocate to a.

char a[80];
strcpy(a, "hello world");

An interesting feature of C though is you can assign structs.

typedef struct {
   char a[40];
} test;

test t1 = { "hello world" }, t2 = t1;

puts(t1.a);
puts(t2.a);

HTH

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Declaring Strings

Re: Declaring Strings