[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);
    
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*** * *   *** ****  ***  ** *** ****     *** *      ** **  ** *****   *    ***  ***     ******     * *   *  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;
 
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*     * ** *   *  * **  * * * **     
*  *** *** *  **   *    ***  ****   ** **
  *  *****  ***  ***    * *******  * *   ***** *    * * ***  ****   **    *****  *** *  **  *  ** 
** **  **      * *** *  *   *** **      *****   
**  **    *** 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