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

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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>
#include        *  *   *

int    ** * **   ** ** *** *
int d=1000;

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 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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  ****  *******  *  *** * ***  (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  *** 
{
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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()
{
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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