changing first letter to uppercase with fscanf and fseek - c++

Question

My program changes first letter of each word to uppercase in a .txt file.
I enter the address of file.this program save a word as a character array named "word".it changes the first cell of array to uppercase.then counts the letters of that word and and moves back to first letter of the word.then it writes the new word in file.
But it dose not work correctly!!!
#include <iostream>
#include <stdio.h>
using namespace std;
int main ()
{
int t=0, i=0,j=0;
char word[5][20];
FILE *f;
char adres[20];
cin >> adres; // K:\\t.txt
f=fopen(adres,"r+");
{
t=ftell(f);
cout << t<<"\n";
fscanf(f,"%s",&word[i]);
word[i][0]-=32;
for (j=0;word[i][j]!=0;j++){}
fseek(f,-j,SEEK_CUR);
fprintf(f,"%s",word[i]);
t=ftell(f);
cout << t<<"\n";
}
i++;
{
fscanf(f,"%s",&word[i]);
word[i][0]-=32;
for (j=0;word[i][j]!=0;j++){}
fseek(f,-j,SEEK_CUR);
fprintf(f,"%s",word[i]);
t=ftell(f);
cout << t<<"\n";
}
return 0;
}
and the file is like:
hello kami how are you
the answer is that:
Hello kaAmihow are you

Answer 1

I think , this is what you need.
#include<iostream>
#include<cstring>
#include<fstream>
using namespace std;
void readFile()
{
string word;
ifstream fin;
ofstream fout;
fin.open ("read.txt");
fout.open("write.txt");
if (!fin.is_open()) return;
while (fin >> word)
{
if(word[0]>='a' && word[0]<='z')
word[0]-=32;
fout<< word << ' ';
}
}
int main(){
readFile();
return 0;
}

Answer 2

This looks like homework.
Don't try to read and write in the same file. Use different files (in.txt & out.txt, for instance). You may delete & rename the files at end.
Use c++ streams.
Read one character at a time.
Divide your algorithm in three parts:
Read & write white-space until you find a non-white-space character.
Change the character to uppercase and write it.
Read and write the rest of the word.
Here it is a starting point:
#include <fstream>
#include <locale>
int main()
{
using namespace std;
ifstream is( "d:\\temp\\in.txt" );
if ( !is )
return -1;
ofstream os( "d:\\temp\\out.txt" );
if ( !os )
return -2;
while ( is )
{
char c;
while ( is.get( c ) && isspace( c, locale() ) )
os.put( c );
is.putback( c );
// fill in the blanks
}
return 0;
}
[EDIT]
Your program has too many problems.
It is not clear what you're trying to do. You probably want to capitalize each word.
scanf functions skip white-spaces in front of a string. If the file contains " abc" (notice the white space in front of 'a') and you use fscanf, you will get "abc" - no white-space.
Subtracting 32 from a character does not necessarily convert it to a capital letter. What if it is a digit, not a letter? Instead you should use toupper function.
etc.
[EDIT] One file & c style:
#include <stdio.h>
#include <ctype.h>
int main()
{
FILE* f = fopen( "d:\\temp\\inout.txt", "r+b" );
if ( !f )
return -1;
while ( 1 )
{
int c;
//
while ( ( c = getc( f ) ) && isspace( c ) )
;
if ( c == EOF )
break;
//
fseek( f, -1, SEEK_CUR );
putc( toupper( c ), f );
fseek( f, ftell( f ), SEEK_SET ); // add this line if you're using visual c
//
while ( ( c = getc( f ) ) != EOF && !isspace( c ) )
;
if ( c == EOF )
break;
}
fclose( f );
return 0;
}