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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f2=2;
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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

Hidden content!
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int main()
{
**  * *  ** **   **  * n,digits = 0,sum = 0;
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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\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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   *** **  ** **  ** * *   ** * ****  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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* ****  *    * * ** ***   *      * (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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*** *** **  ** **  ****  ***  ***** **  *    ** **   ****  
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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 9

Hidden content!
#include <stdio.h>

int main()
{
* ***** * * * * **      * a=1,b,c,d,e,f,g;
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***   ***       *    ***  * ** ***  * %d %d %d\n",c,d,e,f);
 *        *   ** * ***** ** ******     * %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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****    ***   *** **   *  *****         *** ****  **** *  ** ** ****   ** * **  += num % 10;
   ** *  *  ****   **      **  ** * * ** *    ****  *    *  *** ***  **  *  * = num / 10;
*    * *****  ***   * *     *  **   *  * **** *** *   * ** * * *  *** *** **  *
    }
* * *** ***  **  ** **  *    * ***   *    * %d", digits,sum);

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

Comments

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