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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else f2=4;
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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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* * *** *  * * *   * * * *      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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}

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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int main  ** 
{
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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;
*   ***  *  * *  * ** *  **    *       **       ***** **  **
   ***   **     ** *     *******  *   *    ** * * *  * * *******
*****  * **  * *  ** * * ** *   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