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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}

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

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

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

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* *** **    *     * **    ** 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)
{
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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;
   ** *   * *   *  *  ** * *   * *    *   **   *  *  * * *
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***   *  *******    **   *           * **   *   *  * **  = 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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 *    *** ****      *  ** *
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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