- #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 
- a=2; 
- b=5; 
- c=4; 
- d=9; 
- printf("最大の数は%d\n",- 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 
- return (x>y)?:x,y; 
-   
- } 
-   
-   
-   
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