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