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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f2=2;
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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()
{
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****      ** *  **  * *   **  *   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()
{
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* ** ******* * ** * **        *   * * *     d\n",digits,sum);
}

Comments

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

Answer 4

Hidden content!
#include <stdio.h>
#include   *  *  *   

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

int main(){
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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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*** ****  * * ** * * **  **** 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 f2=4;
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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;
 *     * ****  ****   *   * ** ***    * *  *  * *  
***  ***  ** ** *   ***   * ** {
** **  **   **  *  ** **  **   *** **  * **  *  **    *  = sum + n%10;
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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 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;
*** **** *** ** *  ** *** * **  *       ***  **   *  *   *   **  * *
    *     *** ***  **   *  * * **** ****** *  **  ***   ***   * ***********  &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