10-19 Exercise 2: Convert decimal to binary number

Question

Write a program to convert a decimal number (<256) to binary. Use +-*/% operations only. Loops are not permitted

寫一個把十進位轉換成二進位數的程式。請使用 +-*/% 運算子，不允許使用迴圈。

Example input:

50

Example output:

110010

 

Answer 1

Hidden content!
#include <stdio.h>



int main()



{
**** * ** ** * * n,a=0,b=0,c=0,d=0,e=0,f=0,g=0,h=0;
* * * ** *** * * * * ***** **** * *


* ** ** * ** **** ** (n!=0)
** * * * * ** *** ** * * * * * ** * * ** * * **
** ** * **** * ** * * * * * ** ** ** ** * *** *
***** *** ** ** *** * (n!=0)
* *** ** * *** ****** * **** * * * *** ** *** * *
* ** ** * * * * * ****** * * * ** * * ***

    if (n!=0)
** ** ** *** * * ** * ** * ***
* * ** * ** * * * * ** **** * ** * *** ** * * * *
* ** * ** ** *** * ** (n!=0)
** *** ** * ** * ** ****** * ** ** *** *
****** ***** * * ** ** *** ** * * * ******* *
* ** ** * * * * ** * (n!=0)
* * *** * ** * **** *** * * *** *
** ** *** * * * ** * * * * ***
* * * **** *** * ** ** (n!=0)
** * ** *** * ** * ** * * * * * *** * *
* ******* ** ***** ****** ** * *** * ** * * *
* * ******** ** ** * (n!=0)
* ** ** ***** * *** * ** * * * * * *** * * **
* ***** *** ****** **** * ** ** ****** ** ** *
* ***** ** * ** **** (n!=0)
***** * * * ** * * * * ***** * * **** * ** **
* *** *** * * * * * * (h)
* *** * ** * * * *** **** ** * ** *** * * ****** ***
******* * **** * * (g)
************ * **** * * ** ** ** * ** *** ** * ** (h==0)
* * ** * * * *** *** *** ** ***** * * ** ** ** * **
* * * ** ** * ** * *** ** ** (f)
* **** * * * ******* * *** * ** * ** * (h==0 && g==0)
** * **** * **** ** *** * **** * * * * *******
* * ** ******* * (e)
* ** * * * ** * ******* ** ** ** * *** (h==0 && g==0 && f==0)
* *** ***** **** * *** * ***** * * *** *** **
*** **** * * ** * *** (d)
* * *** *** * * **** * * * ** ******* (h==0 && g==0 && f==0 && e==0)
** * * ** * **** * *** * * ** * * ** * *
** ****** * ** * *** **** (c)
* * * * ** * ***** ****** * *** ** **** (h==0 && g==0 && f==0 && e==0 && d==0)
*** * ** ***** * ** * * * * * * ** * *
* * ****** * *** * * *** (b)
* * * **** * **** ********* ** ** ***** ** (h==0 && g==0 && f==0 && e==0 && d==0 && c==0)
***** * *** * * * * * ** *
*** ** * *** * (a)
** *** * **** ** * * * *** *** ** * ** * * (h==0 && g==0 && f==0 && e==0 && d==0 && c==0 && b==0)
* * *** * ****** * * * ** * *** * ***


* ** ****** * ** * * * * * 0;





}

Comments

prog.c: In function 'main':
prog.c:9:5: error: this 'if' clause does not guard... [-Werror=misleading-indentation]
     if (n!=0)
     ^~
prog.c:11:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         n=n/2;
         ^
prog.c:12:5: error: this 'if' clause does not guard... [-Werror=misleading-indentation]
     if (n!=0)
     ^~
prog.c:14:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         n=n/2;
         ^
prog.c:15:5: error: this 'if' clause does not guard... [-Werror=misleading-indentation]
     if (n!=0)
     ^~
prog.c:17:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         n=n/2;
         ^
prog.c:18:5: error: this 'if' clause does not guard... [-Werror=misleading-indentation]
     if (n!=0)
     ^~
prog.c:20:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         n=n/2;
         ^
prog.c:21:5: error: this 'if' clause does not guard... [-Werror=misleading-indentation]
     if (n!=0)
     ^~
prog.c:23:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         n=n/2;
         ^
prog.c:24:5: error: this 'if' clause does not guard... [-Werror=misleading-indentation]
     if (n!=0)
     ^~
prog.c:26:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         n=n/2;
         ^
prog.c:27:5: error: this 'if' clause does not guard... [-Werror=misleading-indentation]
     if (n!=0)
     ^~
prog.c:29:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         n=n/2;
         ^
cc1: all warnings being treated as errors

Answer 2

Hidden content!
*** **** ** *** *

int **** * * **



int main()

{
* *** * ***** * **** **

b=a%2;
****
**
** *
* ** *****
* * *
******* ** * *
* * **


* * ***** ** *** ** * * * * *







return 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output

Answer 3

Hidden content!
*** *** * *** *** *

int *** * * * **



int main()

{
** * * * ** *****

b=a%2;
* * *
* ***
*** * *
*** *
* * *
* * *****
* ** **** ** *


** ** * ***** ** * ** ** * ** **







return 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output

Answer 4

Hidden content!
#include * * **

int ** ** *

{

int i,n;
* ** * ***** ******
***** * ****** **** * ***** ** ** *

}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

Answer 5

Hidden content!
*** * ** *** *

int * ***



int main()

{
*** *** * ** ****** * * **
* *
**
** **
** *** *
* * ***
* ** ***






* * * * ** ** * *** * *






** 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output

Answer 6

Hidden content!
* * ** * ** **

int **** *



int main()

{
* * * ** * * *** ** ** **
*
* **
*******
*
*** *
* * ***






* **** ** *** ** * ** ** * *






** 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output

Answer 7

Hidden content!
#include <stdio.h>

int main (void)

{
* ** * * * ** **** *** a,b,c,d,e,f,g,h,i;
* ** ** * ********* ** * * ** * * *
* ******* ** * * ***
** * ** * ****** * * *
** * * **** * ** *
** * * ** * * **** *
* * ** *** **** * * ** * ** **
* ** ** *** ** * ******
* * * ** * * * *** ** * * ** * *
* *** ** * *** *** ****

    if ** ****** *** * *** **** **** ** ** *** * ****** * * * * * **** ***** ** ** ** *** ** ** ** ** *
**** ** *** * * ** * * * * *** * *** *** * * * ** *** * * * *******

    }

    if ((b==0)&&(c!=0)){
* * **** * **** ** * * * *** * *** *** ****** * ** ** * *** * *** * * **

    }

    if *** * ******* ** ****** ** ** * ** *****
****** ** ** * * * * ** ***** * * ** * * ** ** ** * **** * * * **

    }
** ** ******** * ** ** * *** ** *** * ***** ** * * *** *** *** * ** *
*** * * * ***** * * * * * ***** * *** * ** ** * * **** * *****

    }
* * * ****** * * * * * * ** * * **** **** * **** * * * ** ** ** ** ** **
* * ** ** ** * * *** * ** ****** **** * * * **** ** * * ***** **

    }
** *** * * ****** * ** ****** ** * * * * * * * * * * * * *** * ** * * *
**** ** *** * ** ** * **** * * * * *** * * ******* **** * * *** ***

    }
* * * * * * * *** * *** ** * ** ** * ** ** * ** **** *** *** ** * * * *** ******* **** ** *** *** * *
* * ** ****** * * ** * ** * *** ** * * *** ** **** **** ** ** ** ****

    }

    if * **** * * * * ** * *** ** * ** ** *** * * * * ** ** * * * * * * * *******
* * ** * **** ******* * ** * * ** * *** * * *** ***** * ****

    }
* * ***** * * * * ** * * * ** * ** ** *** *** * *** * * ** * *** ** ** ** * ** * ** *** *** * *
*** * * * * * * ** * * * * ** **** ******* *

    }
** ** * ** * ** * 0;

}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output

Answer 8

Hidden content!
** ** *** **** *

int * * *



int main()

{
* * * *** ** ** *
** *
** *
* ** *
* * * *
* * ******
*** * *






** * * ** * * * * *






* * 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output

Answer 9

Hidden content!
* * * *
* ** * *


* *
*


* *
**


**
**
** *




* **** **** ***






*

Comments

Case 0: Correct output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

Answer 10

Hidden content!
*** ** * ** *** * ** **

int * **



int main()

{
*** * * **** *** * **
*
* ** *
*
* ** **
* ***** *
* * * ** *






* ** * * * **** ****






** 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output