9/28 Write a program to swap the values of two variables

Question

Write a program to swap the values of two variables. The program will ask the user to input variables x and y with numerical values. You must write code that exchanges their values: the value of x after your code runs must equal the value that y had before your code ran, and the value of y after your code runs must equal the value that x had before your code ran.

寫一個交換兩個變數的程式

Example input:

3
5

Example output:

5
3

Remember: Your output may be 100% correct, but your code matters!

Comments

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Answer 1

Hidden content!
#include<stdio.h>

int main()
{
*      *   * * * *  ** ***  a,b,swap;
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* ** ** * * * ***    *    **   **   *  ***  **    ****** ** 
   ****  **       *  *  **   **   * * 0;
}

Comments

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

Answer 2

Hidden content!
#include <stdio.h>
int main()
{
* * *   *  **** *  *   *  ** ** first_number;
** ** *  *  **  ****   ** *  ****  second_number;
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***  **  **   ** *  *** ** * *    0;

}

Comments

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

Answer 3

Hidden content!
#include<stdio.h>
int main(){
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return 0;}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output

---

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

Answer 4

Hidden content!
#include<stdio.h>
int main()
{
int a,b;
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return 0;
}

Comments

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

Answer 5

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     0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output

Answer 6

Hidden content!
  ** **     ****  ***
int * *  * *
{
***  * *   * a,b,swap;
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** *  **  *     * *   * ** **  *
swap=a;
a=b;
b=swap;
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*  **   ***    ** *    
      *   * *   0 ;
}

Comments

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

Answer 7

Hidden content!
**  ***   **   **  *
main()
{
** *** *** *       *** *
** *  **    *        *  ** 
 **** ** * *    **   ** ** * 
swap=a;
a=b;
b=swap;
   *  **    ** *   * *  *   a);
 *    *** *     *  ** *
* ** * *** * * * * **  0 ;
}

Comments

prog.c:2:1: warning: return type defaults to 'int' [-Wimplicit-int]
 main()
 ^~~~

Answer 8

Hidden content!
  * **  ****  ***  **   
 int main(){
int a,b;

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return 0;
}

Comments

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

Answer 9

Hidden content!
*   *   **   * *  * *  
*** **    main(){
int a,b;

   * ****** * *** **  * ** ** ***** *    ***      * * * * *** *     ** 

** ***** **   ****  *  ** ** ***  *****    *       **  

return 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output

Answer 10

Hidden content!
#include <stdio.h>

int main(){
 * *    ** **    ** ** **  ***
    ****** **** **  ******    x,y,temp;
** ****** **** *             * *
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 *    * ***  ***** *  **** *  **** **** **  **** * ** * *
    
  *  ***   *** * *  *** ** * ** * ** = x;
  *  ****** ****  ** **   ** *** = y;
 **** * ***  **    * **  = temp;
* ***** ****** ***  * *  * * *   
* *   *   *     *    **** * ***  *  ** * * ***  x,y);
*  * *  * * ** * *** *
** *** **    *  ** *  *  * *  ** * 0;
}

Comments

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