こんなのかな？
/* 悪い例 */
struct VariableNoisyShout{
protected:
void shout(int noisiness){
while(--noisiness >= 0) std::cout << "いて";
std::cout << "！" << std::endl;
}
~NoisyShout(){}
};

/* 良い例 */
struct VariableNoisyShout
{
set_noisiness(int n){nn = n;}
protected:
NoisyShout():nn(3){}
void shout(){
int noisiness = nn;
while(--noisiness >= 0) std::cout << "いて";
std::cout << "！" << std::endl;
}
~NoisyShout(){}
private:
int nn;
};