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  1. #include <stdio.h>
  2. int nai();
  3. int main()
  4. {
  5.   	int i;
  6.   	int sosu;
  7.  
  8.   printf ("数字を入力");
  9.   	scanf ("%d\n",&sosu);
  10.  
  11.   if (	sosu > 2 && sosu % 2 ==1)
  12.   /*sosuが2以上、かつsosuが奇数の時ループ実行*/
  13.   for (i=3;;i + 2)
  14.   {
  15.     	if (sosu % i == 0)
  16.     		break;
  17.    /*iで素数を割り切れたらループ終了*/
  18.    }
  19.   		 if (sosu == 1)
  20.   		       int nai() ;
  21.   		 if (sosu == 2)
  22.   			printf (" 素数") ;
  23. 	if (sosu % 2 == 0)
  24. 		int nai();
  25. 			if (i ==sosu)
  26. 				printf ("素数");
  27. 	return 0;    	
  28. }    	
  29.     int nai()
  30.   {
  31.     printf("素数ではない");
  32.    return 0;
  33.   }
  34.  
  35.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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5
compilation info 
prog.c: In function 'main':
prog.c:13:3: warning: statement with no effect [-Wunused-value]
   for (i=3;;i + 2)
   ^
prog.c:20:12: error: expected expression before 'int'
            int nai() ;
            ^
prog.c:24:3: error: expected expression before 'int'
   int nai();
   ^
stdout
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Standard output is empty
https://ideone.com/zhrUyv
language:
C (gcc 8.3)
created:
9 years ago
visibility:
secret

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