declarations after printf/scanf?
Author
I''m trying my hand at vanilla C, and I cant declare any new variables after I use printf/scanf. What gives, and is there a workaround?
in c, you can´t declare variables anywhere, they must be inmediatly after the begining of the function.
ie:
int main() {
int var;
float another;
char and_so_on;
// from here, you can´t declare any variables
}
ie:
int main() {
int var;
float another;
char and_so_on;
// from here, you can´t declare any variables
}
quote:
in c, you can´t declare variables anywhere, they must be inmediatly after the begining of the function
Not quite correct. It''s not that they need to be declared at the beginning of a function. They need to be declared at the beginning of a code block.
function my_CFunc(void){ int anInt; // okay doStuff();}function my_CPPFunc(void){ doStuff(); int anInt; // okay in C++, compiler error in C}function anotherCFunc(void){ int anInt; doStuff(); if(something) { float aFloat; // okay - the braces indicate a code block doStuff(); } switch(somethingElse) { case A: { int anInt; // okay } break; case B: float aFloat; // error break; }}Remember that C predated C++, so many features that C++ has are supposed to be improvements. The ability to declare variables anywhere you like is one of them.
yep, you''re right, but i don''t know enough english to express myself like you did.
anyway, i think your correction was fair
anyway, i think your correction was fair
Author
Ah all right, thanks guys. It does encourage more structured programming I guess... although doing "for(int i = 0....)" is just convenient sometimes.
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
