c++ - Private Class Variables -

i having trouble accessing private class variable in 1 of programs. made test program still don't understand i'm doing wrong.

test.h

class test { private:     int number; public:     int randomize(); }; 

test.cpp

#include "test.h" #include <iostream>  int test::randomize() {     number == 1;     std::cout << number;     return number; } 

main.cpp

#include "test.h" #include <stdio.h>  int main(int argc, char* argv[]) {     test test;     int result = test.randomize();     printf ("number = %d", result);     return 0; } 

i warning when compiling

test.cpp:6:9: warning: expression result unused [-wunused-value]         number == 1; 

and outputting

134514363number = 134514363 

i have no clue going on. thinking outside scope maybe. mean still compiling fine, thought wouldn't able access number @ if wasn't doing right.

any appreciated. thanks

== comparison operator; returns bool true if operands equal.

= assignment operator; assigns right operand left 1 , returns first operand (as lvalue).

so, number == 1 telling compiler "check if number equal 1 (and discard result of such comparison)"; notice compiler warning - says you have expression without side-effects result discarded, useless instruction , "suspect" (hence warning).

what want, instead, number = 1, i.e. "set number 1".

in other words, problem here never assigning definite value number in code (because misspelled =), , number remains @ "indefinite" value (which, in program, happens 134514363, due garbage left on stack crt initialization routines).