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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******* * ** ** *** * *
** 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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****** **
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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()



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


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


* *** **** * * **** 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;
* * *** *** ***** * ** * **** * ****


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* * * * **** * *** * ** * ****** *
* ** * * * * * * **** ** * **** ** ** ** *
*** * **** * ** *** * **** (n!=0)
** ** * ** ** * * *** * * ** ** *** ***
** ** * ** ** * * * ** ** * * *** * *** * **

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