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

    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 && g==0)
** ** ** ** * ** * * ** * ****** * * *** *** *** ***
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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)
**** * * * * ** * ** ** ** ** **
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* * * ** * * ** ** ***** * * * * * * * (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 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