need help with string manipulation.

This is a discussion on need help with string manipulation. within the C Programming forums, part of the General Programming Boards category; this code has some bugs Im new to c strings. the code that i have below reverses each word. For ...

  1. #1
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    need help with string manipulation.

    this code has some bugs Im new to c strings. the code that i have below reverses each word. For example. i entered "house is" it reverses it to "si esuoh" I want it to reverse it by word like "is house".

    My other questions since strings are pointers how do I call each one in an array?

    here is my code

    Code:
    #include <stdio.h>
    #include <string.h>
    
    
    void reverse(char *sPtr);
    
    int main (void)
    
    {
    
    char sentence[80];
    
    printf( "enter a line of text:\n");
    
    fgets(sentence,80, stdin );
    
    printf("\nThe line printed backwards is\n");
    reverse( sentence );
    
    return 0;
    
    }
    
    void reverse ( char *sPtr){
    
    if(sPtr[0] == '\0') {
    	return;}
    
    else {
    	reverse(&sPtr[1]);
    	putchar(sPtr[0]);
    }
    
    }

  2. #2
    Programming Wraith GReaper's Avatar
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    You need to break the sentence to each phrase, and then print them reversed.
    Devoted my life to programming...

  3. #3
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    reverse it like tokens?

  4. #4
    Programming Wraith GReaper's Avatar
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    Quote Originally Posted by newbc View Post
    reverse it like tokens?
    Yes, but this time you'll read one word with each iteration.
    Devoted my life to programming...

  5. #5
    Third Eye Babkockdood's Avatar
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    I would suggest calling your function every time there's a space, and breaking up strings into individual words.

  6. #6
    Registered User ssharish2005's Avatar
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    The solution would be pretty straight forward. Use strtok (although i'm not very about on strtok as it alters the orginal string. but for beginning should be ok) to tokensie the string with the ' ' as a deliminator. And call the the your reverse function on every token.

    Code:
     p = strtok( ... )
     while( p != NULL )
     {
        reverse( p );
        p = strtok( NULL, " " );
     }
    And also why you using recursive method to reverse a function. Would much efficient to just go with the traditional method with looping.

    ssharish
    Life is like riding a bicycle. To keep your balance you must keep moving - Einstein

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