#include <stdio.h>
void cal(int x,int y,int*add,int*sub
);
int main(void){
int a,b,n1,n2;
cal(n1,n2,&a,&b);
return 0;
}
void cal(int x , int y , int*add , int*sub){
*add=x+y;
*sub=x-y;
}
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