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동적 할당 계산기 ver1
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#include <iostream>
using namespace std;
class Calculator {
private:
int x, y, result;
char op;
public:
void input() {
cout << "입력(ex,7+2): ";
cin >> x >> op >> y;
}
void cal() {
switch (op) {
case'+':result = x + y; break;
case'-':result = x - y; break;
case'*':result = x * y; break;
case'/':result = x / y; break;
}
}
void output() {
cout << result;
}
};
void main() {
Calculator *n = new Calculator;
n->input();
n->cal();
n->output();
delete n;
}
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동적 할당 계산기 ver2: ver1의 필드를 포인터로
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#include <iostream>
using namespace std;
class Calculator {
private:
int *x, *y, *result;
char *op;
public:
Calculator() {
x = new int;
y = new int;
result = new int;
op = new char;
}
void input() {
cout << "입력(ex,7+2): ";
cin >> *x >> *op >> *y;
}
void cal() {
switch (*op) {
case'+':*result = *x + *y; break;
case'-':*result = *x - *y; break;
case'*':*result = *x * *y; break;
case'/':*result = *x / *y; break;
}
}
void output() {
cout << *result;
}
};
void main() {
Calculator *n = new Calculator;
n->input();
n->cal();
n->output();
delete n;
}
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