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!
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int main()

{

int *


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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 2

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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 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

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 5

Hidden content!
* * ** ** * ****

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 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()



{
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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()



{
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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;
* ** ** ** ** ** ** * **** * *** * *


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*** ******** * * * ** * * *** *** *** * ***
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    if (n!=0)
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*** * * * * * ** * * * ** ** * ** ***
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* ** *** * * ** * **** * *** * * ** * * * *
* * * ** ******** (f)
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**** ** ***** * * **** * ** * **** * **
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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)
** * ** ** * ***** ** * *** *** *
* * * * *** *** ** ** (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)
*** * * * ** * * **** * * ** **** * * ** *** *
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* ** ** * ** * ** * (n!=0)
* * * * ***** ** * ** ** * * *** * *
*** * *** ** ** ***** (h)
** * *** **** **** *** * * * * *** * * * *** ***** *
**** ** * ** ** * * * ** (g)
* * ** **** * * * * ** ** * * * * * **** (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)
** * * * ** * * * * ****** * * * * ***
* * * *** ** ** ** *** (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