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

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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 6

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 7

Hidden content!
#include <stdio.h>



int main()



{
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    if (n!=0)
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** * * * ** ** * *** * * ** * * ****
* * * ** * * * * * **** (e)
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** * ** *** *** ** ** (d)
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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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*** * ***** **** ** ***** *** * *** * ** *


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****** * ** * ** * *** * ** * ** ***

    if (n!=0)
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** * * * ***** *** * * ** * * ** * ** * (h==0 && g==0)
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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;
** * * * * * * * * * * * * **** * ******* *


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

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