- #include<stdio.h>  
- int main()  
- {  
-      int a=2,b=3;  
-      swap(&a,&b);  
-      return 0; 
- }  
-   
- swap(int *x,int *y)  
- {  
-      int t;  
-      //x=malloc(2);  
-      //y=malloc(2);  
-      t=*x;  
-      *x=*y;  
-      *y=t;  
- }  
-   
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