1-11 Exercise 1: UPPER and lower letters

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Write a program that reads strings of up to 1000 characters continuously and displays them, after replacing the lower letters with upper letters and vice versa.

寫一個程式 輸入一個字串(最多1000)  把小寫轉大寫大寫轉小寫

Example input:

With the rise in GLOBAL warming and increasing POLLUTION levels, it is becoming essential to find a viable alternative to the internal combustion engine petrol powered CAR.

Example output:

wITH THE RISE IN global WARMING AND INCREASING pollution LEVELS, IT IS BECOMING ESSENTIAL TO FIND A VIABLE ALTERNATIVE TO THE INTERNAL COMBUSTION ENGINE PETROL POWERED car.
[Exercise] Coding (C) - asked in Chapter 13: Strings
ID: 41431 - Available when: Unlimited - Due to: Unlimited
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main()
{
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    }
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}
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Case 1: Correct output
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main()
{
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    }
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}
answered by (-140 points)
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prog.c: In function 'main':
prog.c:13:28: error: expected expression before '[' token
         else if(a[i]>='A'&&[i]<'Z')
                            ^
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#include  ** ** *   

int main ()
{
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** *  ****** ** * *   * ch, s[1000];

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 * *******  *   *  ** (s[c] != '\0') {
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  *  *  **  *   **   ** * * * **     *  *   if (ch >= 'a'  *  *   *    ch <= 'z')
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}
answered by (16 points)
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prog.c: In function 'main':
prog.c:9:4: warning: 'gets' is deprecated [-Wdeprecated-declarations]
    gets(s);
    ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/cckJajTZ.o: In function `main':
prog.c:(.text+0x3b): warning: the `gets' function is dangerous and should not be used.
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#include   *  **  *** * * 
***** * *****  ***
*   *   * ****  *  *  
int   ** ** 
{
char a[1000];
int i,n;

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{
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}

printf( ***  *  * ******  a );

***   *   * ***** ** **    *
return 0;
}
answered by (-32 points)
edited by
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prog.c: In function 'main':
prog.c:10:1: warning: 'gets' is deprecated [-Wdeprecated-declarations]
 gets(a);
 ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:11:3: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
 n=strlen(a);
   ^~~~~~
prog.c:11:3: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:11:3: note: include '<string.h>' or provide a declaration of 'strlen'
/tmp/ccbGRkOb.o: In function `main':
prog.c:(.text+0x25): warning: the `gets' function is dangerous and should not be used.
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prog.c: In function 'main':
prog.c:11:3: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
 n=strlen(a);
   ^~~~~~
prog.c:11:3: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:11:3: note: include '<string.h>' or provide a declaration of 'strlen'
commented by (4.3k points)
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Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
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#include ** * ** * *    * * 

int main ()
{
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 * ** ******* *  * ch, s[1000];
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   ****** ***** *  * *** *  ***  *** *** *** if (ch >= 'a'    * * *   ch  * *** 'z')
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}
answered by (-140 points)
edited by
0 0
prog.c: In function 'main':
prog.c:8:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(str);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccEVmRzQ.o: In function `main':
prog.c:(.text+0x30): warning: the `gets' function is dangerous and should not be used.
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:7:4: warning: 'gets' is deprecated [-Wdeprecated-declarations]
    gets(s);
    ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccYGFu22.o: In function `main':
prog.c:(.text+0x2f): warning: the `gets' function is dangerous and should not be used.
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:7:12: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[1000]' [-Wformat=]
    scanf("%s", &s);
            ^
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Case 1: Wrong output
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#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int main()
{
*     *   ****  ** *   *****  *** a[1000];

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    }

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

* **  *****   *  *    ** *** **  0;
}
answered by (-16 points)
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#include <stdio.h>
int main()
{
*    *   *** ** **   * *      a[1000];
*    *  * ** **  * **   **** i=0;
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    {
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    }
   *  **** **         ** * ****    ***** * **   
***   ***   *   * ***  *  ***   0;
}
answered by (-229 points)
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#include *** *** *  ***
#include       *  * *   *

void main()
{
* *****     *   * * *  *****  sentence[1000];
 * *   *    **** ** ***** ** count, ch, i;

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**** *** * * * **  *** ****
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** *  *     **    * *   *   *
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**** *  *  *** ***** ***    *   *** = i;
**   * *    ***  ** **   (i = 0; i < count; i++)
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*  * * *  *   **** ***  ** * * *****  * *** *     ** **  * *
  **   * ****  * **** ***
}
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   *  ***** **   ****   
 *** * *   *  **      
int   * *   
{
 **   *  **  ** char a[1000];
**  *   *  * *     *  *  *   **  
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           *      * * * ***  *
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*** * * * ****    *  *   * **   ** ** * *    ***   * **  **  
 ****  * *  **   *** }
 ** *     *  ***  }
* * ** *** **** *  **    ** *  *** **
}
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#include<stdio.h>
#include<string.h>
int main()
{
    int i;
    char a[1000];
    fgets(a,1000,stdin);
*       *   ****  * ****   * *****  *  **** * *  * *
*    ** *   * *  * ** * ** **   *  ****    *** ** **
****  *  * * *** *** * *  ** *** **      * **   *  *** *       **   ** **  *  *** *    * && a[i]<='z')
* * ***   * * **   *  *  ******      * *   *    *    *   *    *   *  * * ***   *  *    ** *  *   ***  * *
  *  ***   * ***        ** ** *  * * ** ** **    * *   * ****    ** ***  *  *  **   * *****     ** **    ***  *  ** ** * *** ** ***** **** **
** ** *   *** *  * ** * ***  *   ********** ***  *     * ** *** ********* * *   * * *** *** * ***** **** *  ****
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*   ***  * * **  ** *  *** * **  * *** ** * ***      ***  *   *  ***    *  *    *  ****   *    *** * **  
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** * ***  *  *     ** * ***** ***    *******  ****   * *   *    ***  ****     ***** * ** *   **  **  *  * ** **
*  **    *   *  *  ****** *  *  *** ******  **  * *
 * ** * *** * **   ****    *  *    ** ** ** ** **  * *** ****** * * ** *  * *   
}
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