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

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 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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** * * ******* (h)
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* * *** * * * ** * (g)
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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)
* ** * * ** * * ** * ** * * * *
**** * * * ****** * (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)
* * ** **** * ****** *** ** ** * * *** *** *
**** * * **** *** * * ****** * *** *

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