10-26 Exercise 2: Displays the number of its digits and their sum

Question

Write a program that reads an integer (1-4 digits) and displays the number of its digits and their sum. For example, if the number is 1234, the program should display 4 and 10

寫一個輸入四位整數 輸出數字的位數和位數的總和。例如，數字是1234程式會輸出4和10。

More information about Loops here.

 

Example input:

1234

Example output:

4 10

 

Example input 2:

245

Example output:

3 11

 

Answer 1

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int main (void)
{
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f2=2;
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else f2=4;
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}

Comments

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

---

can you use loop to solve this question?

Answer 2

Hidden content!
#include<stdio.h>
int main()
{
*          **  * *****   *  * a,b,c,d,e,f;
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  *     **  *   *   ******  ** ** %d",count,f);
  ***  *** *** **  ******* 0;
}

Comments

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

Answer 3

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*  **  ***   ** * * *  
int main()
{
   ***  * *      **  *  *  n,digits = 0,sum = 0;
*** * *  * *  **** * ** **   ***  **   ** ** *   ** *
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**  *  *     *   *   *  * *  ****  ** *   ***  *  *  *  * ***** = sum + n%10;
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 ** ********** *   ** * *   * while (n > 0);
** *  **    **  **   ***  * *       ****  d\n",digits,sum);
}

Comments

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

Answer 4

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#include <stdio.h>
#include    * *   *  ** * *

int   * **** *** * ** * ** *
int d=1000;

int main(){
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*    ** **  *   * * ****** ** * ****  ** *  *   **** * = a - (currentdigit * d);
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  *  *   ***** ***   **    ** * ** * **    *  * *   *  * ** * ****  %d\n", numdigits, sum);

***   *      **  **  *** *    
    * *    *  ***  *****  **** ***** *  %d", numdigits, sum);
* * **  * * **  *   ** *  ****** ** ** 0;
}

Comments

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

Answer 5

Hidden content!
#include<stdio.h>
int main()
{
**   * ** ****      **   *** * * n,digits = 0,sum = 0;
*   ** * * ***** *   *** *    * *     **    *  *  ***
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****   **     ** *  *** *  *     *       *  **  **
     **   * * * * ** **   while (n > 0);
* *        * ** *    *     *  ** **  * ********* * **
   ***  * * ****** *  ***    *    *    d\n",sum);
}

Comments

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

Answer 6

Hidden content!
#include <stdio.h>
int main(void)
{
***  * ****  *    *  * ***** a,digits=0,sum=0;
*    *  ***** * **    ****   *       * *    ****     *   *
****** ** *** * *  ** ***  *   *  {
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*** **     *   *  ****
* * *  ******* *   * ** * ** (a>0);

**    *   *   ***  * ****** ***   ****  %d",digits,sum);
** **  *  *  **** **  *   **** 0;
}

Comments

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

Answer 7

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      *    **   **** 
int main   ** 
{
int  *   ***
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else if ****
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else f2=4;
* **** *  *       *  * *  
}

Comments

prog.c: In function 'main':
prog.c:15:9: error: left-hand operand of comma expression has no effect [-Werror=unused-value]
 if (a==0,b==0,c==0)
         ^
prog.c:15:14: error: left-hand operand of comma expression has no effect [-Werror=unused-value]
 if (a==0,b==0,c==0)
              ^
prog.c:17:13: error: left-hand operand of comma expression has no effect [-Werror=unused-value]
 else if(a==0,b==0)
             ^
cc1: all warnings being treated as errors

Answer 8

Hidden content!
#include<stdio.h>
int main()
{
** *   *****  *** **   *   **  n,digits = 0,sum = 0;
 ******* * *******  * ***     ** *     **  **        **  
**    ***  *   *   **** **  * {
 * ***** ** *  ** ****  * ** ****         *  * *****   * * = sum + n%10;
    * *  **  *  * ****  *  *  ******   **  ** *  *  * * *   *     *
***** **   ** **  **  *** ***  *** **  * ** **  ***   *** *** 
 **   *      **  *  ****    * *** while (n > 0);
  *** *  *  ** ** **   * *** * ** ***  *** *** * *   *    
   ** *   * *  *   ***    * ***** ** * * d\n",sum);
}

Comments

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

Answer 9

Hidden content!
#include <stdio.h>

int main()
{
**    ***** ** * * ** * a=1,b,c,d,e,f,g;
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    }
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*  *   * **** ****      **  *   * * * %d %d %d\n",c,d,e,f);
** **  * ***    **      *  * ***       %d",a,c+d+e+f);
  **  *  * ** * * ** ***** * ***  0;
}

Comments

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

---

can you write a simpler version of this?
c=b/1000;
d=(b%1000)/100;
e=(b%100)/10;
f=b%10;

Answer 10

Hidden content!
#include <stdio.h>
int main()
{
* *  * *  ***** *  ****  * *   *  * num,digits,sum=0;
 * * *** *  ******  **** * * **    *  *** * **    *  * *****  **** * *
*** ** *****   **  ****   **** **  *  *** *  * ** *  *  *** * * *  ** **     * **  *** &num);
***  * **    ** * **   ***  ** *    ******* *  **
*** ** *   ** *    **   *  *
*  *****   * **   *** *    * * **   *** ***  *     **   ***  ** * *  ***   += num % 10;
 **   ** **      ***  * **** *****  * * * ***       * ** **  * * *   **   *    = num / 10;
 *   **   * ***  **    *     * * *** ** *      *     * * *   *   **** **
    }
  *** *  *    **  *   **    *  ******  **  * %d", digits,sum);

 * ** * *** *  * *** *** *    * *   0;
}

Comments

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