Swap using Pointers

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 //PROGRAM TO SWAP TWO NOS USING POINTERS  
 //Downloaded from www.c4cprog.co.nr  
 #include<conio.h>  
 void swap(int *a,int *b)  
 {  
 int p;  
 p=*a;  
 *a=*b;  
 *b=p;  
 }  
 void main()  
 {  
 int a,b;  
 clrscr();  
 printf("\n\nEnter No 1 : ");  
 scanf("%d",&a);  
 printf("\n\nEnter No 2 : ");  
 scanf("%d",&b);  
 swap(&a,&b);  
 printf("\n\nSwapped Values");  
 printf("\n\n\nNo 1 is : %d ",a);  
 printf("\n\nNo 2 is : %d ",b);  
 getch();  
 }  
 /*  
 OUTPUT  
 Enter No 1 : 5  
 Enter No 2 : 9  
 Swapped Values  
 No 1 is : 9  
 No 2 is : 5  
 */