#include <stdio.h>
//関数のプロトタイプ宣言
//ここ↓を埋めてね1
int max(int x,int y);
//main関数
int main(void) {
int a,b,c,d;
//ここ↓を埋めてね2
printf("%d、%d、%d、%dの中で最大の値は%d",a
,b
,c
,d
,max
(max
(a
,b
),max
(c
,d
)));
return 0;
}
//max関数の定義
int max(int x, int y){
//ここ↓を埋めてね3
if(x<y){
x = y;
}
else x = x;
return x;
}
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