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