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



}

Comments

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

Answer 2

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* * * ** *** ***

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



}

Comments

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

Answer 4

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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 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 ** ***


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

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