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How do you reverse string elements

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hui

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How do you reverse string elements

Nov 1st, 2006

//My function is but the problem is that i dont have a proper working main function
void reverse(int a[], int n) { // function: Reverses the elements of a. // parameters: // a inout array of values. // n in number of values in a, a[0]..a[n-1] // returns: nothing for (int i=0; i<n/2; i++) { int temp = a[i]; a[i] = a[n-i-1]; a[n-i-1] = temp; } return;

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niek_e

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Re: How do you reverse string elements

Nov 1st, 2006

Sorry, but you can't really expect that someone will understand your question or function if you post like this.
Retry and please use CODE-tags, indent your code, post the complete code and ask a clear question.

gr Niek

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hui

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Please help with code for reversing string elements

Nov 1st, 2006

/*My function is but the problem is that i dont have a proper working main function*/

 Help with Code Tags 
 c Syntax (Toggle Plain Text) 
void reverse(int a[], int n) 
{ 
 
 for (int i=0; i<n/2; i++) { 
 
int temp = a[i];
 
 a[i] = a[n-i-1];
 
 a[n-i-1] = temp; 
 
} 
 
}
void reverse(int a[], int n) 
{ 
 
 for (int i=0; i<n/2; i++) { 
 
int temp = a[i];
 
 a[i] = a[n-i-1];
 
 a[n-i-1] = temp; 
 
} 
 
}

Last edited by WolfPack; Nov 1st, 2006 at 6:05 am. Reason: Added [CODE][/CODE] tags

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niek_e

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Re: How do you reverse string elements

Nov 1st, 2006

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the problem is that i dont have a proper working main function

I see...but there are more problems. I'm guessing that you want to reverse a string?? Have a look at this , last post. It's in dutch but I think you will find the code helpfull.

gr Niek

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may4life

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Re: How do you reverse string elements

Nov 1st, 2006

Here's a working example of how to reverse a string using a function. Hope this helps, good luck!

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream>
 
using namespace std;
 
void ReverseString(char string1[], char reversed[]);
 
int main()
{
    const int MAX = 80;
    char string1[MAX];
    char reversed[MAX];
    cout << "Enter your string: ";
    cin.get(string1,MAX);
 
    ReverseString(string1, reversed);
 
    return 0;
}
 
void ReverseString(char string1[], char reversed[])
{
    int length = strlen(string1);
 
    for (int i=length-1, j=0; i>=0; i--, j++)
        reversed[j] = string1[i];
 
    for (i=0; i<length; i++)
        cout << reversed[i];
 
    cout << endl;
}
#include <iostream>

using namespace std;

void ReverseString(char string1[], char reversed[]);

int main()
{
    const int MAX = 80;
    char string1[MAX];
    char reversed[MAX];
    cout << "Enter your string: ";
    cin.get(string1,MAX);

    ReverseString(string1, reversed);

    return 0;
}

void ReverseString(char string1[], char reversed[])
{
    int length = strlen(string1);

    for (int i=length-1, j=0; i>=0; i--, j++)
        reversed[j] = string1[i];

    for (i=0; i<length; i++)
        cout << reversed[i];

    cout << endl;
}

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Ancient Dragon Ancient Dragon is offline

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Re: How do you reverse string elements

Nov 1st, 2006

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Originally Posted by may4life

Here's a working example of how to reverse a string using a function. Hope this helps, good luck!
Help with Code Tags

C++ Syntax (Toggle Plain Text)
#include <iostream>
 
using namespace std;
 
void ReverseString(char string1[], char reversed[]);
 
int main()
{
    const int MAX = 80;
    char string1[MAX];
    char reversed[MAX];
    cout << "Enter your string: ";
    cin.get(string1,MAX);
 
    ReverseString(string1, reversed);
 
    return 0;
}
 
void ReverseString(char string1[], char reversed[])
{
    int length = strlen(string1);
 
    for (int i=length-1, j=0; i>=0; i--, j++)
        reversed[j] = string1[i];
 
    for (i=0; i<length; i++)
        cout << reversed[i];
 
    cout << endl;
}
#include <iostream> using namespace std; void ReverseString(char string1[], char reversed[]); int main() { const int MAX = 80; char string1[MAX]; char reversed[MAX]; cout << "Enter your string: "; cin.get(string1,MAX); ReverseString(string1, reversed); return 0; } void ReverseString(char string1[], char reversed[]) { int length = strlen(string1); for (int i=length-1, j=0; i>=0; i--, j++) reversed[j] = string1[i]; for (i=0; i<length; i++) cout << reversed[i]; cout << endl; }

You really should compile and test your code before posting. It contains several bugs that may just confuse the OP.

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niek_e

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Re: How do you reverse string elements

Nov 1st, 2006

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
 
void ReverseString(char string1[], char reversed[])
{
     int i, length = strlen(string1);
     for (int i=length-1, j=0; i>=0; i--, j++)
     reversed[j] = string1[i];
     for (i=0; i<length; i++)
     cout << reversed[i];
    cout << endl;
    cin.get();
     cin.get();
}
 
void ReverseString(char string1[], char reversed[])
{
     int i, length = strlen(string1);
     for (int i=length-1, j=0; i>=0; i--, j++)
     reversed[j] = string1[i];
     for (i=0; i<length; i++)
     cout << reversed[i];
    cout << endl;
    cin.get();
     cin.get();
}

Here's the reviewed code from may4life.

gr Niek

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may4life

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Re: How do you reverse string elements

Nov 1st, 2006

Hmm, dont know whats going wrong.. I copied and pasted my code from here and still works no prob on my compiler :-S
I always test my code and post it with 0 errors and 0 warnings.. Maybe there might be a mix up with our compilers.. Sorry for anyone who had problems with my code..but they work for me :-S