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

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


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

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