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



}

Comments

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

Answer 5

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 6

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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 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;
** * * * ** ** * * * **** * **** ** ***** *** *


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

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