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



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


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