Problem with variables, C++

Question

This is the intro to my code. It's pulling an error: "..\Playground\:14:1: error: 'b' does not name a type
b = 5 ;
^"
By the way, line 14 is the line I state 'b = 5; '

What did I do wrong? I did almost exactly what the example said to do.

#include <iostream>
using namespace std;

int a = 45; //declare variable a
int b = 21; //write variable b = 21

b = 5 ;

int sum = a + b; //write variable sum = a + b

Answer 1

Mmm, it doesn't seem like your program contains a main function. That could be the problem. You can declare variables a and b outside main, but any subsequent operation on the variables have to proceed within a function which can be executed.

#include <iostream>
using namespace std;

int main() {

int a = 45; //declare variable a
int b = 21; //write variable b = 21

b = 5 ;

int sum = a + b; //write variable sum = a + b
cout << sum;
}

Answer 2

Thanks guys

I had a main function but that wasn't where the problem was. Now I understand I can only redefine a variable inside a function.

Thanks

Answer 3

Jesse Becker as Fermi suggested, you need to use a function to reassign value to a variable.

Answer 4

Nagendra Are you sure about that? I never heard of such a rule in any programming language

Answer 5

Zierol Channel Yes, I was just testing out what the lesson told me about how to redefine a variable. I'm not making anything useful with my code.

Answer 6

Please post your full code. The code you posted doesn't have 14 lines

Answer 7

U can reassign value to variable only after defining all local variables.
That means b=5; not allowed before int sum =a+b;

So, comment //b=5; Then u will not get my compilation error. But, sum =21+45=66

Not sure...!!!

Answer 8

etou.... you have two b in one code ??? ( b=21 & b=5)