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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*  * ** ** * *** ** * * * while (n > 0);
****      ***     **  *   **  *  * * * 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>
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int *    **   **** ***    *
int d=1000;

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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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*  *** ***          **     * *    ** ** * *  * **   = sum + n%10;
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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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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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*****     * *  ** *  ****    **** ** * * ***  ****   **  * 
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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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    }
 * *** *   ** *  ** **** *** * ***  %d", digits,sum);

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

Comments

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