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 * * *


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

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** * *** * * * ***

int main()

{

int * *** ***


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b=a%2;
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}

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 *** **


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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;
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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()



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