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Copy pathstack.cpp
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67 lines (60 loc) · 980 Bytes
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#include<bits/stdc++.h>
usingnamespacestd;
#defineMAX1000
classStack {
int top;
public:
int a[MAX];
Stack() { top = -1; }
boolpush(int x);
intpop();
intpeek();
boolisEmpty();
};
boolStack::push(int x)
{
if (top >= (MAX - 1)) {
cout << " OVERFLOW";
returnfalse;
}
else {
a[++top] = x;
cout << x << " PUSHED\n";
returntrue;
}
}
intStack::pop()
{
if (top < 0) {
cout << "UNDERFLOW";
return0;
}
else {
int x = a[top--];
return x;
}
}
intStack::peek()
{
if (top < 0) {
cout << "EMPTY";
return0;
}
else {
int x = a[top];
return x;
}
}
boolStack::isEmpty()
{
return (top < 0);
}
intmain()
{
classStack s;
s.push(10);
s.push(20);
s.push(30);
cout << s.pop() << " POPPED\n";
return0;
}