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

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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

Hidden content!
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*      * ** * * x    y  * ***  ** *** **  *


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

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return 0;
}

Comments

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

Answer 10

Hidden content!
#include <stdio.h>

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

Comments

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