단일 for문으로 구구단 출력하기

인터넷에서 우연히 보게된 코드이다.

보통 구구단을 출력하는 프로그램을 작성하라고 하면 이중 for문을 사용해서 합니다.

for i=1 ~ 9 까지 

for j=1~9까지

       출력  i x j = i*j

대충 이런 식이죠.

이는 for문 하나만을 사용해서 출력하는 방법입니다

인터넷에서 본 건  C 소스지만 공부 겸해서 Objective-C 로 작성해봤습니다.

//

//  main.m

//  prg1

//

//  Created by 최규성 on 12. 11. 14..

//  Copyright (c) 2012년 규성 최. All rights reserved.

//

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])

{

    @autoreleasepool {

        // insert code here...

        NSLog(@"Programming is fun!");

        

        int iCounter;

        int iDan,iMul;

        for (iCounter=0; iCounter<9*9; ++iCounter) {

            iDan = iCounter/9+1;

            iMul = iCounter%9+1;

            NSLog(@"%d x %d = %d",iDan,iMul,iDan*iMul);

        }      

    }

    return 0;

}

>> 결과:

2012-11-15 00:08:35.686 prg1[4163:403] Programming is fun!

2012-11-15 00:08:35.688 prg1[4163:403] 1 x 1 = 1

2012-11-15 00:08:35.690 prg1[4163:403] 1 x 2 = 2

2012-11-15 00:08:35.691 prg1[4163:403] 1 x 3 = 3

2012-11-15 00:08:35.692 prg1[4163:403] 1 x 4 = 4

2012-11-15 00:08:35.693 prg1[4163:403] 1 x 5 = 5

2012-11-15 00:08:35.694 prg1[4163:403] 1 x 6 = 6

2012-11-15 00:08:35.694 prg1[4163:403] 1 x 7 = 7

2012-11-15 00:08:35.695 prg1[4163:403] 1 x 8 = 8

2012-11-15 00:08:35.695 prg1[4163:403] 1 x 9 = 9

2012-11-15 00:08:35.696 prg1[4163:403] 2 x 1 = 2

2012-11-15 00:08:35.697 prg1[4163:403] 2 x 2 = 4

2012-11-15 00:08:35.697 prg1[4163:403] 2 x 3 = 6

2012-11-15 00:08:35.698 prg1[4163:403] 2 x 4 = 8

2012-11-15 00:08:35.698 prg1[4163:403] 2 x 5 = 10

2012-11-15 00:08:35.699 prg1[4163:403] 2 x 6 = 12

2012-11-15 00:08:35.699 prg1[4163:403] 2 x 7 = 14

2012-11-15 00:08:35.700 prg1[4163:403] 2 x 8 = 16

2012-11-15 00:08:35.700 prg1[4163:403] 2 x 9 = 18

2012-11-15 00:08:35.701 prg1[4163:403] 3 x 1 = 3

2012-11-15 00:08:35.701 prg1[4163:403] 3 x 2 = 6

2012-11-15 00:08:35.702 prg1[4163:403] 3 x 3 = 9

2012-11-15 00:08:35.702 prg1[4163:403] 3 x 4 = 12

2012-11-15 00:08:35.703 prg1[4163:403] 3 x 5 = 15

2012-11-15 00:08:35.704 prg1[4163:403] 3 x 6 = 18

2012-11-15 00:08:35.704 prg1[4163:403] 3 x 7 = 21

2012-11-15 00:08:35.705 prg1[4163:403] 3 x 8 = 24

2012-11-15 00:08:35.716 prg1[4163:403] 3 x 9 = 27

2012-11-15 00:08:35.716 prg1[4163:403] 4 x 1 = 4

2012-11-15 00:08:35.717 prg1[4163:403] 4 x 2 = 8

2012-11-15 00:08:35.717 prg1[4163:403] 4 x 3 = 12

2012-11-15 00:08:35.718 prg1[4163:403] 4 x 4 = 16

2012-11-15 00:08:35.718 prg1[4163:403] 4 x 5 = 20

2012-11-15 00:08:35.719 prg1[4163:403] 4 x 6 = 24

2012-11-15 00:08:35.719 prg1[4163:403] 4 x 7 = 28

2012-11-15 00:08:35.720 prg1[4163:403] 4 x 8 = 32

2012-11-15 00:08:35.720 prg1[4163:403] 4 x 9 = 36

2012-11-15 00:08:35.721 prg1[4163:403] 5 x 1 = 5

2012-11-15 00:08:35.722 prg1[4163:403] 5 x 2 = 10

2012-11-15 00:08:35.722 prg1[4163:403] 5 x 3 = 15

2012-11-15 00:08:35.724 prg1[4163:403] 5 x 4 = 20

2012-11-15 00:08:35.725 prg1[4163:403] 5 x 5 = 25

2012-11-15 00:08:35.726 prg1[4163:403] 5 x 6 = 30

2012-11-15 00:08:35.726 prg1[4163:403] 5 x 7 = 35

2012-11-15 00:08:35.727 prg1[4163:403] 5 x 8 = 40

2012-11-15 00:08:35.727 prg1[4163:403] 5 x 9 = 45

2012-11-15 00:08:35.728 prg1[4163:403] 6 x 1 = 6

2012-11-15 00:08:35.728 prg1[4163:403] 6 x 2 = 12

2012-11-15 00:08:35.730 prg1[4163:403] 6 x 3 = 18

2012-11-15 00:08:35.731 prg1[4163:403] 6 x 4 = 24

2012-11-15 00:08:35.732 prg1[4163:403] 6 x 5 = 30

2012-11-15 00:08:35.732 prg1[4163:403] 6 x 6 = 36

2012-11-15 00:08:35.733 prg1[4163:403] 6 x 7 = 42

2012-11-15 00:08:35.733 prg1[4163:403] 6 x 8 = 48

2012-11-15 00:08:35.736 prg1[4163:403] 6 x 9 = 54

2012-11-15 00:08:35.736 prg1[4163:403] 7 x 1 = 7

2012-11-15 00:08:35.737 prg1[4163:403] 7 x 2 = 14

2012-11-15 00:08:35.737 prg1[4163:403] 7 x 3 = 21

2012-11-15 00:08:35.738 prg1[4163:403] 7 x 4 = 28

2012-11-15 00:08:35.739 prg1[4163:403] 7 x 5 = 35

2012-11-15 00:08:35.740 prg1[4163:403] 7 x 6 = 42

2012-11-15 00:08:35.740 prg1[4163:403] 7 x 7 = 49

2012-11-15 00:08:35.741 prg1[4163:403] 7 x 8 = 56

2012-11-15 00:08:35.742 prg1[4163:403] 7 x 9 = 63

2012-11-15 00:08:35.742 prg1[4163:403] 8 x 1 = 8

2012-11-15 00:08:35.743 prg1[4163:403] 8 x 2 = 16

2012-11-15 00:08:35.744 prg1[4163:403] 8 x 3 = 24

2012-11-15 00:08:35.744 prg1[4163:403] 8 x 4 = 32

2012-11-15 00:08:35.745 prg1[4163:403] 8 x 5 = 40

2012-11-15 00:08:35.746 prg1[4163:403] 8 x 6 = 48

2012-11-15 00:08:35.746 prg1[4163:403] 8 x 7 = 56

2012-11-15 00:08:35.747 prg1[4163:403] 8 x 8 = 64

2012-11-15 00:08:35.747 prg1[4163:403] 8 x 9 = 72

2012-11-15 00:08:35.748 prg1[4163:403] 9 x 1 = 9

2012-11-15 00:08:35.748 prg1[4163:403] 9 x 2 = 18

2012-11-15 00:08:35.749 prg1[4163:403] 9 x 3 = 27

2012-11-15 00:08:35.749 prg1[4163:403] 9 x 4 = 36

2012-11-15 00:08:35.750 prg1[4163:403] 9 x 5 = 45

2012-11-15 00:08:35.750 prg1[4163:403] 9 x 6 = 54

2012-11-15 00:08:35.751 prg1[4163:403] 9 x 7 = 63

2012-11-15 00:08:35.751 prg1[4163:403] 9 x 8 = 72

2012-11-15 00:08:35.780 prg1[4163:403] 9 x 9 = 81