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# 1  
Old 04-13-2011
Question on integer variables (c++)
Hello guys! It's orszhak and in my book I am currently studying incrementing values in c++ and it states thant I could do this to increment the value of nVariable
Code:
 nVariable = nVariable + 2;

it states that I could also do this and assign the same value
Code:
 nVariable += 2;

but can't I also do this and assign the same value to the variable? here:
Code:
 nVariable = 2;

Or what about this
Code:
 int variable;
variable = 2;

Anyways thanks guys! Smilie
# 2  
Old 04-13-2011
Quote:
Originally Posted by orszhak
Hello guys! It's orszhak and in my book I am currently studying incrementing values in c++ and it states thant I could do this to increment the value of nVariable
Code:
 nVariable = nVariable + 2;

it states that I could also do this and assign the same value
Code:
 nVariable += 2;

but can't I also do this and assign the same value to the variable? here:
Code:
 nVariable = 2;

Or what about this
Code:
 int variable;
variable = 2;

Anyways thanks guys! Smilie
I'm guessing you're confused on the concept of increment. += 2 adds two, it doesn't set it to two.

Code:
#include <stdio.h>

int main(void)
{
        int variable;
        variable=0;

        printf("variable is %d\n", variable);

        variable += 2;
        printf("variable is %d\n", variable);
        variable = variable + 2;
        printf("variable is %d\n", variable);
        variable=2;
        printf("variable is %d\n", variable);
        return(0);
}

If that's not what you mean, I'm sorry, I don't understand your question.
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