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!
** ** **** *** ** ** *

int main()

{

int ** ****


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

b=a%2;
* **
* * **
* * *
* *** * * *
* ** **
* ********** * *********** * * *
0;



}

Comments

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

Answer 2

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

int main()

{

int *** *


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

b=a%2;

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



}

Comments

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

Answer 3

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

int main()

{

int * ** **


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

b=a%2;
* ***
* **
* *
** *
* * * *****
*** * ******* *** * ** *
* ** 0;



}

Comments

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

Answer 4

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

int main()

{

int *** ** *


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

b=a%2;

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



}

Comments

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

Answer 5

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

int main()

{

int * **** *


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

b=a%2;
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** 0;



}

Comments

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

Answer 6

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******** *

int main()

{

int * * ***


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

b=a%2;
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*** 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()



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


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    if (n!=0)
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* * ** * ** * *** (n!=0)
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* **** ** * * * *** * * ***** ** ** **** (h==0)
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* * ** * ** * ** ** * *** (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)
** ** * * * ** ***** ** * ** * **** *
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* ** ***** *** * * * ** * * * *


* ** ** * ** ** * 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 8

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)
**** ** * ** *** ** * * * * ***** * **** *
*** ** ** ****** * ***** * **** * * *** *** *
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** * ** * * ****** ** * * * * ** *** *
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    if (n!=0)
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*** *** *** * ** * *** * **** ** * * ***
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****** * *** * * * * ** * **** ** ** * *** * *
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* ** * * * ** ** ***** * ** * * **** * ** * ** **** ** ***
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* * ** ** ****** * * ** ** *** * ** * (h==0 && g==0)
**** * *** * * * * * ** ** * **** ***** *** ****
* ********* ** ** ** ** (e)
* ** * ** * * *** * * ** ** * * ** ** * * (h==0 && g==0 && f==0)
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* * * * ** * ** * ****** * ** *** ** * (h==0 && g==0 && f==0 && e==0)
** ** *** * * ** *** ** * * ** * *** ** ****
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** * ** * ***** * ** * * * ***** (h==0 && g==0 && f==0 && e==0 && d==0)
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* * ** ****** **** **** *** ** *
* ** * * * *** ** * * * (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 9

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 10

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