what am I doing wrong...i have no clue. When I run it, it shows both outputs it's ok & double trouble...

Question

#include <iostream>
using namespace std;

int main() {
int girlsdumped;

cin >> girlsdumped;

if (girlsdumped=1) {
cout << "it's ok" <<endl;
}

if (girlsdumped=2) {
cout << "double trouble" <<endl;
}
return 0;
}

Answer 1

girlsdumped==1………

Answer 2

= assignment (setting value to var)
== equality
=== similar (equal value & type)

Answer 3

why? what's problem with = sign?

Answer 4

oo...Thanks

Answer 5

@ValentinHacker, C and C++ don't have ===.

But yeah, = is always assignment (in which case the value returned is the value assigned) and == is comparison (the value returned is true or false, depending on whether the values converted to the same type are equal).

In the event where a direct comparison or implicit conversion can't be made, you'll get a compile error. Something I've seen coders do quite often to prevent mistakes like the above is use a constant on the left. The assignment will fail because obviously you can't assign a value to them, so the compiler will alert you to the issue instead.

if (1 == girlsdumped)
//etc. Yes, it does actually work.

Answer 6

I'm not sure what you mean by that. Sometimes you want an assignment in cases where a comparison is used. I often see something like the following to step through C strings:

char S[] = "Example";
char C;
while (C = *S)
{
//Process C
++S;
}

Mind you that's unsafe for modern usage due to potential lack of a null character causing buffer overreads but it demonstrates the usage nicely.