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

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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** 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;
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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 6

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 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)
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    if (n!=0)
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*** * * ** ** * * * ****** * *** * ** * *** *** *** *
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**** * * ****** * * ** (n!=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)
* ** **** * ******** * ****** ** * * ** * *
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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 8

Hidden content!
#include <stdio.h>



int main()



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


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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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**** ** ***** *** ** ****** * * *** ** ***** * * *
** * * * ****** (f)
* * * *** ** ** * ** ***** * * * * ** (h==0 && g==0)
*** *** ** *** ** * * * **** ****** ** * * *
* ** * * * * (e)
* * * ** *** * *** * ** * * * **** * * (h==0 && g==0 && f==0)
* * ** * * * * *** ** *** ** * ** ** * ** ********
*** * ** * * *** * * * (d)
* * * * ** * * * *** * * * ** *** * ** (h==0 && g==0 && f==0 && e==0)
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** * ** ** * ** **** * (c)
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** ** * * ** * ** *** *** * * ****** * **
** * ***** * * ****** * * (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