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!
#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 2

Hidden content!
*** * * ** *

int * * * *



int main()

{
**** * ** * *****

b=a%2;
******
** **
**
* ** *
* ** * ***
** * *
** * * ** * *


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







return 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output

Answer 3

Hidden content!
** * ** * *** *

int * * *



int main()

{
* ** * * * * * ** * **

b=a%2;
*
** * **
** * *
** **
** ** **
* **** *
** ** * ****


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







return 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output

Answer 4

Hidden content!
#include *** ** ****

int * *** *

{

int i,n;
* * ***** ***** * *** * *
* ** ** * *** *** ****** ** * * * * ** * * * ** * *

}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

Answer 5

Hidden content!
* * * * ***** *** *

int * * *** *



int main()

{
* ** ** * * * **
***
*
* **
* * *** **
*** ** *
**






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






* * 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output

Answer 6

Hidden content!
* ** * * ****

int ** **



int main()

{
** * * * **** ** * *
**
****
* *
***

** * *






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






* 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 (void)

{
* *** **** *** *** a,b,c,d,e,f,g,h,i;
*** * * * * ** ** ** ** * * * ** ** * ** * *
* * * * * * * * * *** **
** **** * ************
**** * * * ***** ** ** **
* ** * *** * * **** * *** * *
**** ** * * * * * **** *** * * * ***
*** ** ** ******* *
***** **** ** * * * * * ****
* * * * ** * *** * ******* * *

    if *** * *** * **** * * * * * ** *** ***** *** *** ***** * * *** **** * ** *** * * * * ***
******* *** * ** * * * * ** * *** ** * ***** ** * * * * * * ******** *** * *

    }

    if ((b==0)&&(c!=0)){
** *** * *** **** * * ** * ****** ** * * * * *** * ******* *** * ****

    }

    if ****** * * * * * * ****** **
** *** * ** *** * *** *** * * ** * * * * ** * **** ** ****** * ** ***** *

    }
******* * * * * ** * * * ** * * ** * * * * * ****** * * ** * * * *
** * **** * * **** ***** * *** ** ** *** * * * *** * ** *** ** ** **

    }
* *** ** *** ** * * * * * **** * *** ** * * * **** ***** *** * ** * **
*** * * * * *** * ** * * **** ** * *** * * * * * * * *

    }
* * * ** ***** *** ** * *** **** ** ** ** * *** *** ** ** *** ** ** *** ** * ***
* * * ** **** *** * *** **** * * ** * ** * **** ** ** ** * *

    }
** * * **** * * * * * **** ** ** * * * * ** ** *** *** * * * ** ** * * * **** *
** * **** * * **** * ** **** * * ** * ********** * *** *** *

    }

    if *** * * * * ****** * *** *** ** * ***** ** * * ** ***** * ** **** * **** * * * * * * ** * **
** ** * ** ** *** * ***** ** ** * ** * * *** ** * *** **

    }
* *** * * * ** ** * * * * ** *** ** ** * ** ****** * ** *** * *** ** ***** ** ** ** ** ** *** *
** * * * * * ** ******* * ***** * * ***** * * ***

    }
* *** *** * * * ** * 0;

}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output

Answer 8

Hidden content!
* * * ** * * ** **

int *** **



int main()

{
* * * **** ** * *
* **
* * *
* **
* * ***
** * * ***
**** ** *






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






* 0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output

Answer 9

Hidden content!
* * * ** ** **
* *


* *



*
**


* *
**
*




* * * *** ** *






*


*

Comments

Case 0: Correct output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

Answer 10

Hidden content!
*** *** * * *

int ** * * *



int main()

{
**** * **** * ***** **
*
*
* **
*** * ***
***
* * * * *






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






0;



}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Wrong output