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