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;
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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 *** * *


* *** ** * * ***

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 ** * * * *


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

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()



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


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


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