#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("a+b=%d,a-b=%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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