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

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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**  *** * ***  *  ** *    **    while (n > 0);
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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>
#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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}

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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 * **** *** * *    ***** * ***   *  *  * **  %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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** *  *   * ****  ***   
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{
int * * ** * ** 
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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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   ****     * * * ***    *** 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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* * *** ***  ***     * * * ** * ** * *      *** **  *     * * *  ***  **** * 
    }
*  * ***  ** ***   * * ****  ***   *  * %d", digits,sum);

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

Comments

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