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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* *** ***   *   **   **** 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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    **** **   ***      * * ** **    * *   **     * ** * **  * ** **  * %d\n", numdigits, sum);

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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);
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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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  ***** ** *  **  *      **  ** *  ** *     %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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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",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()
{
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*   ** *** * *   ***  ****   * *       ****   **     *****  **** ** * ***
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 ** * ***   ** **     *   ** **** *    **  *  * ** *   ****  * ***  * * * * * * *    * += num % 10;
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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