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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}

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>
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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)
{
*  ** **       ** *** ****        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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}

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;
 **  *** ****  **  **** * **  **    *   ***  **  ** *     *  *   *
 ** ** *  **   *   ** * *     **    *  ** *  *  **** *      *** **** ** *** ** *  &num);
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** * ****   * *   *     **  
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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