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