#include<iostream>
using namespace std;
void swap1(int &a,int &b) //commonly used
{
int temp;
temp=a;
a=b;
b=temp;
}
void swap2(int &a,int &b) //doesnt involve the use of a temporary variable
{
a=a+b;
b=a-b;
a=a-b;
}
int main()
{
int a,b;
cout<<"enter two numbers :";
cin>>a>>b;
swap1(a,b);
cout<<a<<" "<<b;
swap2(a,b);
cout<<a<<" "<<b;
system("pause");
return 0;
}
pop double stack
#include <stdio.h>
#define MAXSIZE 100
int sp = 0;
double stack[MAXSIZE];
void push(double f)
{
if (sp < MAXSIZE)
stack[sp++] = f;
else
printf("error: stack is full\n");
}
double pop()
{
if (sp > 0)
return stack[--sp];
else
{
printf("error: stack is empty\n");
return 0;
}
}
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