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changing case for first and last letter

kzaiter (21)
i need ThE FirsT AnD LasT letter of every word to be uppercase and the rest lowercase but function convertFirstAndLastLetter only does the first and last of the sentence.

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  #include <iostream>
#include <string>
#include <ctype.h>
#include <string.h>
#include <cctype>
using namespace std;

void convertFirstAndLastLetter(char wrd[])
{
    size_t last = strlen(wrd) - 1;
    size_t first = 0;
    
    wrd[first] = toupper(wrd[first]);
    wrd[last] = toupper(wrd[last]);

    for(int i = first + 1 ; i < last - 1; i++)
    {
        wrd[i] = tolower(wrd[i]);
    }
}


void ChangeCase(char word[])
{
  for(size_t i = 0; i < strlen(word); i++)
  {
    if(isupper(word[i]))
      word[i] = tolower(word[i]);
    else
      if(islower(word[i]))
        word[i] = toupper(word[i]);
  }
}

  int main ()
{
    float val;
    cout << "ent ";
    cin >> val;
    if (val == 1)
 {
        cout << "string: ";
        char s[256];  // declaring s array with 80
        cin.ignore();
        cin.getline (s,256); // input data into named array s
        for(int i = 0; i < strlen(s); i++)// 
            s[i] = tolower(s[i]);
        cout <<endl << s << endl;
        return 0;
 }
    if (val == 2)
 {
        cout << "string: ";
        char s[256];  // declaring s array with 80
        cin.ignore();
        cin.getline (s,256); // input data into named array s
        for(int i = 0; i < strlen(s); i++)// 
            s[i] = toupper(s[i]);
        cout <<endl << s << endl;
        return 0; 
 }
    if (val == 3)
 { 
         char s[256];
        cin.ignore();
        cin.getline(s,256);
        ChangeCase(s);
        cout << s;

  return 0;
 }
     if (val == 4)
 {
        char wrd[256];
        cin.ignore();
        cin.getline(wrd,256);
        convertFirstAndLastLetter(wrd);
        cout << wrd;

  return 0;
 }

}


Last edited on
lsk (141)
1. change everything to lower
2. change [first] and [last] to upper
3. find ' ' in the string , assume position is x
4. change [x-1] and [x+1] to upper

done.
Last edited on
kzaiter (21)
how can implement that in my code i understand it logically but not completly understanding how to do it
lsk (141)
try to do it, and ask me step you stuck.
I'll be here answering you.
kzaiter (21)
um i have gone wrong

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void convertFirstAndLastLetter(string& wrd)
{   
    
    size_t last = strlen(wrd) - 1;
    size_t first = 0;
    
    wrd[first] = toupper(wrd[first]);
    wrd[last] = toupper(wrd[last]);
    
    for(int a = 0; i < strlen(s); i++)// 
            s[a] = tolower(s[a]);
    
    for(int i = first + 1 ; i < last - 1; i++)
    {
        wrd[i] = toupper(wrd[i]);
    }
}
lsk (141)
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    for(int a = 0; i < strlen(s); i++)// 
            s[a] = tolower(s[a]);


infinity loop, you used i++ with a vars.

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for(int i = first + 1 ; i < last - 1; i++)
    {
        wrd[i] = toupper(wrd[i]);
    }


what is this line for ?

Why don't you try to use step I suggest ?
Last edited on
kzaiter (21)
cause i am a rookie who is struggling at the moment
lsk (141)
Okay, so.
Something like this.


1. change everything to lower

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for i=0 -> i=last {
    wrd[i] = tolower(wrd[i]);
}


2. change [first] and [last] to upper

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wrd[first] = toupper(wrd[first])
wrd[last] = toupper(wrd[last])


3. find ' ' in the string , assume position is x
4. change [x-1] and [x+1] to upper

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int x
for x=0 -> x=last{
    if( wrd[x] == ' '){
        wrd[x-1] = toupper(wrd[x-1])
        wrd[x+1] = toupper(wrd[x+1])
    }
}


BTW, you have to try to understand some, there'll be better.
Last edited on
kzaiter (21)
that is very true currently looking for tutor. i appreciate everything i really do.

im going to try what you gave me abd let you know
kzaiter (21)
this works with char?
lsk (141)
What 'this' ?
BTW, I'm not sure about your tolower() and toupper(), I like to use
X = X-'a'+'A' and X = X-'A'+'a' more -..-
Last edited on
kzaiter (21)
no not 'this' the code your sharing with me char works it doesnt have to be string?
and your X = X- 'a' +'A' you do that for every letter?
Last edited on
lsk (141)
The string is just array of char,
just process EVERY CHAR in the STRING.

As I understand your wrd is your string, right?
I just process the CHAR in it.
Last edited on
kzaiter (21)
ok thanks... any recommended reading on a different note? while i try to make this work
LendraDwi (311)
use this to split your sentence http://www.cplusplus.com/reference/cstring/strtok/
then process each words separately
lsk (141)
I think learning about 'char array in C/C++' is good to read and understand.

You can google it, not much hard to understand.
kzaiter (21)
compiling errors

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#include <iostream>
#include <string>
#include <ctype.h>
#include <string.h>
#include <cctype>
using namespace std;

void convertFirstAndLastLetter(char wrd[])
{
    size_t last = strlen(wrd) - 1;
    size_t first = 0;
    
    int i
    for i=0 -> i=last {
    wrd[i] = tolower(wrd[i]);
    }
    wrd[first] = toupper(wrd[first]);
    wrd[last] = toupper(wrd[last]);
    

    int x
    for x=0 -> x=last{
    if( wrd[x] == ' '){
        wrd[x-1] = toupper(wrd[x-1])
        wrd[x+1] = toupper(wrd[x+1])
    }
}
	

}


void ChangeCase(char word[])
{
  for(size_t i = 0; i < strlen(word); i++)
  {
    if(isupper(word[i]))
      word[i] = tolower(word[i]);
    else
      if(islower(word[i]))
        word[i] = toupper(word[i]);
  }
}

  int main ()
{
    float val;
    cout << "ent ";
    cin >> val;
    if (val == 1)
 {
        cout << "string: ";
        char s[256];  // declaring s array with 80
        cin.ignore();
        cin.getline (s,256); // input data into named array s
        for(int i = 0; i < strlen(s); i++)// 
            s[i] = tolower(s[i]);
        cout <<endl << s << endl;
        return 0;
 }
    if (val == 2)
 {
        cout << "string: ";
        char s[256];  // declaring s array with 80
        cin.ignore();
        cin.getline (s,256); // input data into named array s
        for(int i = 0; i < strlen(s); i++)// 
            s[i] = toupper(s[i]);
        cout <<endl << s << endl;
        return 0; 
 }
    if (val == 3)
 { 
         char s[256];
        cin.ignore();
        cin.getline(s,256);
        ChangeCase(s);
        cout << s;

  return 0;
 }
     if (val == 4)
 {
        char wrd[256];
        cin.ignore();
        cin.getline(wrd,256);
        convertFirstAndLastLetter(wrd);
        cout << wrd;

  return 0;
 }

}
Last edited on
lsk (141)
Mines is just psudo-code, you change it yourself.
Last edited on
kzaiter (21)
i c. still banging away
kzaiter (21)
i cant figure it out still i have been going at this for 12+ straight hours. burnt out... thank you for everything tonight i think i need to give it a rest though. once again thank you and please check back tomorrow as i will be working on this still.
Last edited on
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