[AD] 20171109 作業1

2 like 0 dislike
3.6k views
小學一年級的數學

剛開始學習數學的時候，我們都是從個位數的加減乘除開始學習的，請寫一個程式，教你的程式學會個位數的加減乘除。

輸入說明：

程式會輸入三個字元，代表一個算式，會用下面的樣式呈現

運算元 運算子 運算元

其間會用單一個空白隔開，運算元是一個個位數的數子，運算子可能是+-*/中的任何一個。

輸出說明：

請輸出輸入算式的結果到整數位數

輸入範例：

1 +  2

輸出範例：

3
[Exercise] Coding (C) - asked in 2017-1 程式設計(一)AD by (18k points)
ID: 31085 - Available when: Unlimited - Due to: Unlimited
edited by | 3.6k views

23 Answers

0 like 0 dislike 
Hidden content!
#include ***   *   * * 
#include    * * ** *
int main(int argc, char const *argv[])
{
  *  **   * * int   **  
**  * *  **   * char c;

  * * *    *   * *    *  *    %c   ****  ***     *     ***** **  
 *  ** *       **   *   *   ***  switch(c)
  * * * * ** **    **   *   *** {
  **    * *  *     ****  * **** **   *** *   *** case '+':
*   *   ** *  * ** ***  * **  **   **        * * ****   *     ans=a+b;
*  * *   ** *  * **     ****     *** * *    * * * *** ****** break;
* *  *  *  *     **    * *  * ** *   *   case '*':
      * ** *** *   **  **     *         * * **   * *** *** ans=a*b;
*****   *   ***   ******  *   * * *  ** *** * *  ***  *         *** * break;
* ****   * ** *      ** *    ****   * ** * **  * case '-':
 * *    *  **** * * *  * **  ****  *    **     ***    ****   * ***  ans=a-b;
  ***  * *  ****  ****     ***** ***      ***  *          ** ** break;
 **   *** *   * *** *  * ****** **     *  case '/':
*** *   *     *   **** **  ** ***  *    *** ***  *     *  **  *  *   ans=a/b;
* *** * *  ***  * ** * *  * *    ****   *       *****     ** ** break;
 **  **    *     *  *    * *  *    ** *** default:
** * *  *    **  *      *  **     ***    * *  **   *  ** * *    * *    ** * * *    * *
*  ***   * *   *      ** * **** **  *   * *  ** *   **  * break;
   * *  *   * **** **     **** }

 **   * **       ***  ** *  ***** * **** * * **** * );

 ******   *** * return 0;
}
answered by (114 points)
0 0
prog.c:1:1: error: expected identifier or '(' before numeric constant
 4#include <stdio.h>
 ^
prog.c:1:2: error: stray '#' in program
 4#include <stdio.h>
  ^
In file included from prog.c:2:0:
/usr/include/string.h:43:8: error: unknown type name 'size_t'
        size_t __n) __THROW __nonnull ((1, 2));
        ^~~~~~
/usr/include/string.h:46:56: error: unknown type name 'size_t'
 extern void *memmove (void *__dest, const void *__src, size_t __n)
                                                        ^~~~~~
/usr/include/string.h:62:42: error: unknown type name 'size_t'
 extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1));
                                          ^~~~~~
/usr/include/string.h:65:56: error: unknown type name 'size_t'
 extern int memcmp (const void *__s1, const void *__s2, size_t __n)
                                                        ^~~~~~
/usr/include/string.h:92:48: error: unknown type name 'size_t'
 extern void *memchr (const void *__s, int __c, size_t __n)
                                                ^~~~~~
/usr/include/string.h:129:39: error: unknown type name 'size_t'
         const char *__restrict __src, size_t __n)
                                       ^~~~~~
/usr/include/string.h:137:9: error: unknown type name 'size_t'
         size_t __n) __THROW __nonnull ((1, 2));
         ^~~~~~
/usr/include/string.h:143:57: error: unknown type name 'size_t'
 extern int strncmp (const char *__s1, const char *__s2, size_t __n)
                                                         ^~~~~~
/usr/include/string.h:150:8: error: unknown type name 'size_t'
 extern size_t strxfrm (char *__restrict __dest,
        ^~~~~~
/usr/include/string.h:151:40: error: unknown type name 'size_t'
          const char *__restrict __src, size_t __n)
                                        ^~~~~~
/usr/include/string.h:280:8: error: unknown type name 'size_t'
 extern size_t strcspn (const char *__s, const char *__reject)
        ^~~~~~
/usr/include/string.h:284:8: error: unknown type name 'size_t'
 extern size_t strspn (const char *__s, const char *__accept)
        ^~~~~~
/usr/include/string.h:394:8: error: unknown type name 'size_t'
 extern size_t strlen (const char *__s)
        ^~~~~~
/usr/include/string.h:446:33: error: unknown type name 'size_t'
 extern void __bzero (void *__s, size_t __n) __THROW __nonnull ((1));
                                 ^~~~~~
prog.c: In function 'main':
prog.c:8:2: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
  scanf("%d %c %d",&a,&c,&b);
  ^~~~~
prog.c:8:2: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:2: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:24:5: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
     printf("Wrong input\n");
     ^~~~~~
prog.c:24:5: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:24:5: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:28:3: warning: incompatible implicit declaration of built-in function 'printf'
   printf("%d",ans );
   ^~~~~~
prog.c:28:3: note: include '<stdio.h>' or provide a declaration of 'printf'
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
 *  * **  ** ***   *** 
int main()
{
    **     * int x,y,z;
** *   ** **  char a;
***     *    **   **    %c  ***       **  *  *  *  * ;
* * **  ** *    * * 
* ***  ** * *   *   **   *** *  **    * *
  * *  **   else
** **** **    if(a=='+')
 ** **     * * ** ****  * **** **  * ** 
 ** ***   else
** **** * **    *  *
** ****** ** **   * ****   * ** **  ***  ***
**** *** *******  else
   ** *    **       * *
 *  *  **  *****  * * ** **** **  * *   
  *  *     ** 
   *** *    ** * *   ** *** *  *  **  
** *  * *      
*  *   *   *** **   **   *** **    0;
}
answered by (172 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
  **   * **  ***** ** *
int main()
{
 int a,c,x;

 char b;
 *     ** * *** %c    * * ** * ****   **     ***  * ***

if(b=='*')
    ** * **** *** **    **  **
***  **  *  *  *  ***  if(b=='-')
* *   *  *  * *  * *** *     ***  ***** **  

 *   * * * **   * * ******* *****     * *  if(b=='+')
  *  * *  *** * * * * ** ****     ** * *  **    *   ** ****  * ** *

***     * * * ***  ** * * *  ****  **   * ****  **    * *    if(b=='/')
*  *    **   **  ** ************  *  *     ***  *** ***   *  *      *  ***** * **  * **  ***


 ** *  **** *    * * ****  ****
 return 0;
}
answered by (236 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <string.h>
int main(){
    int a,b;
 **  * ** *  *** *      ****  ***   c;
 **      * *  * *  ** *  ** ****   * %c   ***  ** *  *   *  * * *    *
 ** **   *   * * **** * ***  * *   **    *     
** ******   **  *** *         * **    ** *** *  * ****   **** ***  0;
**   *  * ***** *** * ***  *   * ******    ** ***  
  *  ***  ***** * *     *    *   *** *   *  **   * *  **  0;
   *   *   ****   ** ** * ***  *  
  *  * **  ** * ***** * *   *   *  ****  * * * ** *** *********** ****  * **
** **   *** *  *  ***   * ** *  * if(c=='-')
 * * *** *  ****   *  *** *  *  * * ***  ** ** ***** ******      ***   
    else if(c=='*')
*  * ******** *  *    **   *   * **   * ** ******    **** * **    **  ** *****
    else if(c=='/')
**   ****  * *****   * *    * *   ** ******     * ** **   * *** ** *  **  *
* *** ****  * ** **** **** 
**  *     **   ****** *    ** ** * ***  * **  ** **    0;
*  ***  **      *  ***  *   * *   0;
}
answered by (212 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <string.h>
int main(){
    int a,b;
** ** *    **  **  * * *** ** c;
   * * ** **  ******  * *  **  *** ****  * %c   ** *   * *  *** **  ** *****
 * ***   **   **** *   * * * * *  ** * * **  *   **  
** * * ***  * * * ***  ****      **    *  ** **    *   * * 0;
***    * * *  * * **  * ***  *******      * *   * 
   ***** * **  * * ***** *  * ***  ** **** ***  * *** *** 0;
 *  *** * *   * **  ** ***  *  
** *** *   * ******  **********  *      ****** *   *  ** *** *  *  * **    **
  * *   *  ** * *  * **** *       * if(c=='-')
  * * ** ***** **   **** ** ** **    *** *** *  ** ** * * * *** ** *     * * * 
    else if(c=='*')
 * **   *   * *  **     *     **     * *  ***    * **** * ***  * *******  *
    else if(c=='/')
   * ** * *  *   * * **     ** *** *     ***   *  ** ** **  *** *** ***   * * 
* *  *  ******    ***   *  
 ** *  **  *  *   *   * ******  *  * **  *********  *  *****   0;
* *      ***     ****  * *  ** **** 0;
}
answered by (194 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
***** **   *  ***** 
int main()
  *****   *      
   ***      * * char a,b,c;
**  **  *    int    * *
   *     *    
  *** **** *  ******** *** %c ***  * **  *  *   * **   * * ** *  
** * * *    * ***   
   **  * * if(b == '+')
 ** * * * ****   {
  **    ***  ** *  ********* *   *** * 
 ** **   **  **      ***  *  ** * **    *
    *  *    ** ********** * **** *** ** * * 
*       * * **   **  ** ***   *  
**  * *   **** *  * *   ** ** **   **  **   ** *      **
**     *  **   ** }
  *         * *   else if(b == '-')
**  *    *** {
 ****  * **     ***  ** ** *  **  * *   * * *  
*  *** *   ****** ****   ***   * ** ** * **
    ***       * **        * ** ****  **** * 
    **         
        *     ** *  ***     
* * *** *    }
**  ***   else if(b == '*')
 ** * *     **  {
 ** * *   ***     *   **  *   ****** **  * ***
  **  **  **    *    * *  * * * ** * * **  *****  
  * **  * *****  *** **  *************  ***   *****
 * **    * *    **    *  **  *** 
   ** *    **  *  *****  *   * *  *  ** * **   *   * 
***   ** *  }
   *     *  ** else if(b == '/')
 **    *  * *  {
    * *   *   ******  * *   ** ** *     *  
 * **     * **** *  ********        *** * 
*  ****  ** *  *  **    *  ***  *******   *      ****
* **     ***    ** ** * * *   
**  *     *****  *   *    ** ** ** * * *     * ** 
**  *  *    **  }
***  **  *   *  else
* *  ***   ***  *  {
* * **  *      ** *  ***  *   * ** *  ******   *  *** ****** *     **
 ** ***  * * **  }
      *   return 0;
*  *     **    
}
answered by (202 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
*  ***  *****  *****  

int **   **  ** * 
{
  ** * ** ***** char ***   

 * *    *   ** 
  ** *  **** ch1 =  * * *
*** **   *  * **  ch2 =    ***
*  ** * *     ch3 =   ** *
*   * *** **** * 
  * *  *  **  if( ch2 == 43 )
 *   *     *    * * **       **     **  **
* ***** ** *  ** else if( ch2 == 42)
***   *   ****    *** *   ** **  *** *  *** 
* *   * *     *  else if( ch2 ==45)
 *   * ** * * **  * * * **    ***  * 
 *  *** **   *  else if( ch2 == 47)
*   * *   **      **** * ******* ***  ** *    **
*     * **    
*  ** *  *    ** 
   *****  *******   *  0;
  * ** * *
answered by (160 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
* *** **  *   *  

int **       *  
{
** *  *   * * * char * ** *** 

* * *  * **    *** ** **   *** **   **    *** *
*  *      **  ch1 = **  * *
 * * *     **** * ch2 = *  **  
    *    *  *  ch3 =    **   *
  * *    * *  
****  *   * *  if( ch2 == 43 )
*  ** *  **     **      ***  **     **  **
   *  *  *  * else if( ch2 == 42)
** * **** *  ** ****** *** **  ** ** * ***   *** *
 ***   ***  **  else if( ch2 ==45)
  *   *   * * **  **     **  ***  *** * * * ** 
*  * * ***  * ** else if( ch2 == 47)
* * * *  **   *****   *     ****        **  * * *  * ** *     
*  *         
* * **   *  * **   
*   **** * ** **  return 0;
 *** * *
answered by (160 points)
0 1
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
#include <stdlib.h>
int main()
{
*** * * *     *** *    * *  ** a,b,c;
 * *  * *   ** ****    *** *    *    * *    %c  *    *   * * *** ***    ** ****  
  * *  **** **  *  *********** * d=a-'0';
*  * * *    * **  * *** *  e=c-'0';
 *    * *   *     **  * * *    *  **
 ***  **  ** ****  * ***** 
*******  * ***** **  * *  **   ***    ** *     **  *       *  *****  
    }
  **   *  * *   *   *  * if(b=='-')
*** ** * * * ***   * * * *     *** * **  **        *    * *    *   * *  *   ***
 ** **   ***  ***    *  ***  if(b=='*')
* **  * * * * ***** **       *  *     ** * *   ****      **   *  **    * ********* 
  ***  * *  *   *     *   ***** *
*   **    **** *  ** *** *  ** **  ***** * *  *  ** ** *** **** * **  *** *      * 
** ** * *** *****   *  ******  0;
}
answered by (100 points)
1 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>

int main(void)
{
    * **  **   * ***** ***** *** a, c;
**  **    *     ** * **  *     b;
    *     *** ** *           *   *   %c %d", &a, &b, &c)
* * *  *    *  *  *   * *  * == '+')
 **   *  *  * ***      *  ** ** ** *   **  *  **    **   **    * ***  **   ** ** a+c);
 *   **  * * *** * ** *  * if(b == '-')
 * ****  * *  * *  * **    * **     **  *****  **** ** * ***** *   **  *   a-c);
 * ***   *  * * *  * ******  if(b == '*')
***** ** **** *** ** ***  *  ** * **  *   ** *****   **  *  *  * * *** * a*c);
* ******       **** ** *    if(b == '/')
 ** ** *    *** * * *  ***  **** *   *     *  *    *    **    *  * a/c);
***   ***** *    ** * ** ** *  *
* ********* *  *   * *   *
** ***  *   ** * ** **  * 0;
}
answered by (138 points)
0 0
prog.c: In function 'main':
prog.c:8:5: error: expected ';' before 'if'
     if(b == '+')
     ^~
prog.c:10:5: error: 'else' without a previous 'if'
     else if(b == '-')
     ^~~~
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.59.242
©2016-2025

Related questions

2 like 0 dislike
29 answers
[AD] 20171109 作業3
[Exercise] Coding (C) - asked Nov 9, 2017 in 2017-1 程式設計(一)AD by Shun-Po (18k points)
ID: 31094 - Available when: Unlimited - Due to: Unlimited | 4.5k views
2 like 0 dislike
31 answers
[AD] 20171109 作業2
[Exercise] Coding (C) - asked Nov 9, 2017 in 2017-1 程式設計(一)AD by Shun-Po (18k points)
ID: 31088 - Available when: Unlimited - Due to: Unlimited | 5.3k views
3 like 0 dislike
9 answers
[AD] 20171116 question 1
[Exercise] True/False - asked Nov 16, 2017 in 2017-1 程式設計(一)AD by 楊修俊 (30k points)
ID: 33763 - Available when: 2017-11-16 14:00 - Due to: 2017-11-16 14:30 | 759 views
3 like 0 dislike
9 answers
[AD] 20171116 question 2
[Exercise] True/False - asked Nov 16, 2017 in 2017-1 程式設計(一)AD by 楊修俊 (30k points)
ID: 33764 - Available when: 2017-11-16 14:00 - Due to: 2017-11-16 14:30 | 829 views
1 like 0 dislike
0 answers
[AD] 20180104 作業 1 參考答案
[Resource] asked Jan 4, 2018 in 2017-1 程式設計(一)AD by 楊修俊 (30k points)
ID: 40762 - Available when: Unlimited - Due to: Unlimited | 26 views
12,783 questions
183,442 answers
172,219 comments
4,824 users