#include <stdio.h>
void keisan(int a, int b, int* p1, int* p2);
void main(void) {
int tasizan = 0;
int hikizan = 0;
keisan(20, 5, &tasizan, &hikizan);
printf("足し算=%d\n", tasizan);
printf("引き算=%d\n", hikizan);
}
void keisan(int a, int b, int* p1, int* p2) {
*p1 = a + b;
*p2 = a - b;
}
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