[Final exam] Question 10

Question

Question 10: Please write a program that can calculate tax 7% (0.07) of a product price, then outputs the tax and a total price including the tax.

Hint:

*Use %.2f for two decimal points*

*Printf a new line between the tax and a total price including tax*

Input1

80

Output1

5.60
85.60

 

Input 2

452

Output2

31.64
483.64

 

Answer 1

內容已隱藏
#include <stdio.h>
#include <stdlib.h>
int main(){
 ** *   *** **** ***    *   * n;
** ** ** *  ******   **     ***   m=0.07;
    
*    *  * **  * **  **  ********* *****   **   **     *   
** ****  **  * * * **** * ****  ***  ** * **   n*m);
    
***   *  **   **  *  * *******   ***** ***   **
***** ** ** **  * * * *** **   * **             ** *   *** ** **    **   *** * *    ** * **  *** * ** * ** *    **
   **  **** ** ***     * ** **    * **  ***    ******   ** *** * *  * **   *  **   *    *    * ** 0;
**   * * *      ** **    ***     *  * *      *   * * * *   **   *    * *     ** ** *    *** *   **  *

Comments

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

Answer 2

內容已隱藏
#include <stdio.h>
#include <stdlib.h>

int main(){
    *** * *      **** **    a;
    **  * * *** *  * * *  ****** b=0.07;
*      *  *   *  *  *  *
    *** *      * ** ** *  **** ** *    **** * *  &a);
***   * ** *      * *** *   ** ** *** *   **  **  ** a*b);
* * * *  ***   ****  **  *   
* *** ***    **** *** ** ** * **  *****  * * * * (a*b)+a);
 ** *     ***  * ****    
**  * *  *  * **   * * *  *****   * *    ** ***   
* *** *  **** **    *         * ***  0;
}
* *** * * ** *** **  ** **** 

Comments

prog.c: In function 'main':
prog.c:9:14: warning: unknown conversion type character '>' in format [-Wformat=]
     printf("%>2f", a*b);
              ^
prog.c:9:12: warning: too many arguments for format [-Wformat-extra-args]
     printf("%>2f", a*b);
            ^~~~~~

Answer 3

內容已隱藏
#include <stdio.h>
#include <stdlib.h>

int main(){ ** * * ***   * * ***  **   ***   **    *** 
  ** **  * **  * *******    **** a;
*** * **   ** *   * ****    ******* b=0.07;
 * *** *** ** * * ****** *   
*** *   *   ** **   ******** *  ** **    *** **   *  
*   *** **  **    * * 
  * *** *    ** *  *  *   * *  ***   **  * **   a*b);
**   **    *   * * ******  **** *******  *  **** **  * (a*b)+a);
** *** **  *  * ** **** *

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

Comments

prog.c: In function 'main':
prog.c:11:18: warning: format '%d' expects a matching 'int' argument [-Wformat=]
     printf("%.2f%d", a*b+a);
                  ^

---

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

Answer 4

內容已隱藏
#include  ***  ** *  * ** 
int main()
{
**   * *   *       *    *** n;
** *  * * *  **   *** **  **  sum,c;
  **** *  *   *  *  *  *** **** *******     ** 
*   *     ***   *** * * **  = n*(0.07);
***   **  **   *  ** * * ** = n + c;
*          * *   * *  ** **  * *****  *** *  ** *  *** *
  

Comments

prog.c: In function 'main':
prog.c:7:17: error: 'n' undeclared (first use in this function)
     scanf("%d",&n);
                 ^
prog.c:7:17: note: each undeclared identifier is reported only once for each function it appears in
prog.c:10:12: warning: missing terminating " character
     printf("%2f\n%.2f,c,sum);
            ^
prog.c:10:12: error: missing terminating " character
     printf("%2f\n%.2f,c,sum);
            ^~~~~~~~~~~~~~~~~~
prog.c:10:5: error: expected expression at end of input
     printf("%2f\n%.2f,c,sum);
     ^~~~~~
prog.c:10:5: error: expected declaration or statement at end of input

---

prog.c: In function 'main':
prog.c:7:17: error: 'n' undeclared (first use in this function)
     scanf("%d",&n);
                 ^
prog.c:7:17: note: each undeclared identifier is reported only once for each function it appears in
prog.c:10:5: error: expected declaration or statement at end of input
     printf("%.2f\n%.2f",c,sum);
     ^~~~~~

---

prog.c: In function 'main':
prog.c:9:5: error: expected declaration or statement at end of input
     printf("%.2f\n%.2f",c,sum);
     ^~~~~~

Answer 5

內容已隱藏
#include <stdio.h>
#include <stdlib.h>

int main(){
   * *****   ** **** ****  a;
 **  ***  * ***  *****   * *  b=0.07;
* *  * * * *  **   * *    **    
  ***  **     *****  *** *** **       * **   * &a);
*   * *   *   * *   ***  *   * **** * ***    *        a*b);
  * *  ****  *   **   *   *
  *  * *****  * ***  *  *     *     *  *  *      *  (a*b)+a);
**** **     *   **  ***    **
 * * *  * *** * * **  **  *  **  *  ****  *** * *  * **
 **  ***  **  *  **     * *  0;
}

Comments

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

Answer 6

內容已隱藏
#include *    * **   * * * 
#include  * *      *   * *

int main(int argc, char *argv[])
{

  ** *  **** * *  *** *  * a;
 * *  ** *  **  ** * **   ** *      b=0.07;
  * *** * ***  *  **     ** ** *  **   *   ***     ** *
*** *  ***   * *****    *** ***  *****  * ****  ** *
 *  *****      **  **    ** *****  ** **  **  *   * (a*b)+a);
**  *   **      * *  **   * *   *  ********** 
   * ** *  *        * * ***   0;

}

Comments

prog.c: In function 'main':
prog.c:7:13: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
     scanf("%d",a);
             ^
prog.c:9:12: warning: too many arguments for format [-Wformat-extra-args]
     printf("\n",b);
            ^~~~

---

prog.c:1:19: fatal error: cstdlib: No such file or directory
 #include <cstdlib>
                   ^
compilation terminated.

---

prog.c:1:19: fatal error: cstdlib: No such file or directory
 #include <cstdlib>
                   ^
compilation terminated.

Answer 7

內容已隱藏
#include <stdio.h>
#include ** *   *** *     *

int main(int argc, char *argv[]) {
   ****     * ***** *** * *
* * **  ****  * **  * **    p,tax,total;
 **  *** **  ** *  **** *** *  * *  * **  *****  &p);
******  *** *  **   ********** * ** 
 ** *  *   * * *   * * *  *   * *  
 *   * * *   * *** ***    *** * *  ** **  *****  * ** tax);
****  ***    ** ** *   *       ** ** * ** *  **
* ***  **  *  ** *   *  **  ****  **       *** ** *  
****  * *  *** * **  * ****  
      *    *   * ***   * *
* *  *  * *   ** ** ***** *  *   0;
}

Comments

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

Answer 8

內容已隱藏
***  ***  * *** *  ***

int main () {
 **  **  *
** **     ** ** * a;  *  * *  * **** **   * ****  **
* *       *  * ***** ** ***   **  *** ** * * *  %0.2f\n", a*0.07);
*  *   ** ****  *  ****** * **     * **  * **** **** ***  *      *
* *** *  *  *      ** *   * 0;
}

Comments

prog.c: In function 'main':
prog.c:7:14: warning: spurious trailing '%' in format [-Wformat=]
      printf("%\0.2f\n",a+a*0.07);
              ^
prog.c:7:15: warning: embedded '\0' in format [-Wformat-contains-nul]
      printf("%\0.2f\n",a+a*0.07);
               ^
prog.c:7:13: warning: too many arguments for format [-Wformat-extra-args]
      printf("%\0.2f\n",a+a*0.07);
             ^~~~~~~~~~

Answer 9

內容已隱藏
 *** *        * **** ****
#include *  * *** * **  * 

int main () {
* ***  ***** *
* **  **  ** * ** *** a;     * *   ******* * *   * *
  **  * * *    *     *   *   **** * * * *    %f\n", a*0.07);
**  **** ** *** * **     **** **   * **  **   * ****   *** * *  *    
  ***    ***** *  **   ***   * 0;
}

Comments

prog.c: In function 'main':
prog.c:8:15: warning: unknown conversion type character 0xc in format [-Wformat=]
      printf("%\fn",a+a*0.07);
               ^
prog.c:8:13: warning: too many arguments for format [-Wformat-extra-args]
      printf("%\fn",a+a*0.07);
             ^~~~~~

Answer 10

內容已隱藏
#include  * **  **  *  * 
#include *    **  * * **

int main(int argc, char *argv[])
{

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

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

---

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

---

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