#include<stdio.h>
void main()
{
int number1,number2,number3;

        printf("enter the first number");
        if(scanf("%d",&number1)==1)
        {
                printf("enter the second number");
                if(scanf("%d",&number2)==1)
                {
                number3=number2;
                number2=number1;
                number1=number3;
                printf("number1=%d\n",number1);
                printf("number2=%d\n",number2);
                }
                else
                {
                        printf("Error,Enter the number in decimal data type.");
                }
        }


===============================OUTPUT==================================

enter the first number232
enter the second number23
number1=23
number2=232