#include <stdio.h>
int main()
{
      int firstNo, secondNo ;

      printf("Enter the first number: ");
      scanf("%d", &firstNo);

      printf("Enter the second number: ");
      scanf("%d",&secondNo);


      firstNo = firstNo - secondNo;

      secondNo = firstNo + secondNo;

      firstNo =secondNo - firstNo ;

      printf("\n After swapping, firstNumber is :  %d\n", firstNo);
      printf("  After swapping, secondNumber is : %d", secondNo);

      return 0;
}
OUTPUT :

Enter the first number: 123
Enter the second number:789

After swapping, firstNumber is :  789
After swapping, secondNumber is : 123
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