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

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

Comments

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