#include <stdio.h>
//引数の絶対値を返す関数
	return (x>0)?x:-x;
}
//引数の二乗を返す関数
int square(int x){
	return x*x;
}
//main関数
int main(void) {
	int a,b;
	a=1;
	b=2;
	printf("|%d^2-%d^2|=%d\n",a
,b
,(square
(a
)-square
(b
))); 	return 0;
}
 
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