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