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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}

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

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#include<stdio.h>
int main()
{
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}

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()
{
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}

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

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 * *  *   **  ** *  * **  * ** *      %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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* *  * ****   * * * **  ***   *    * 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 ***  
{
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}

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;
 *   ****  **** ***   * ***  ****  *****  *****  * **  **
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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 9

Hidden content!
#include <stdio.h>

int main()
{
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  **     *   * *  *     * **  *      %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;
 ** * **   *   *  *** * *  ***** *       ***  ** *  **  ***   * 
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*** ***     **** **  * ****  
**  *   *      **** *** *  ***   * *** *     ****  *     ***  *   ** * ** *  * *    += 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