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;
* *
** *
* ** *
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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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** * * * * * * ** ** (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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*** *** ** *** **** ** * * * ** **** * * ** *
**** *** * * **** *** (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 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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**** **** *** *** * *** * * * * ** *
* **** ******* ** * **** * ***** ** * ** * *** **

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