Searching for a string in a file in C++

In C language, a string is stored in an array of char characters, the char type can store a letter (we said only one letter and no more). It can also store numbers between -128 and 127.
Since the computer only understands numbers, letters are transformed into numbers. So each character is associated with a number. The C language does this very quickly. e.g.:

The character 'a' corresponds in the ASCII code to the number 97. To check, type alt+97.

    char letter = ' to ';
    printf("%c\n", letter);

Page  Channel  is an array of type char:
      char  string[]="I'm a programmer";

Our goal is to read from a text file and find out if a text file is available. string is in this file. We have a file in the  Directory  "C:/test.txt",  c file contains text, for example a simple sentence:my name is X and I'm a programmer.

In C,  char  channel[]  is represented as follows:
j
e
s
u
i
s
u
n
p
r
o
g
r
a
m
m
e
u
r
'\0'

' \0 ' indicates the end of the array.


#include < iostream> 
#include < fstream> 
#include < string> 
#include < sstream> 
using namespace std; 

void searchInFile(char string[])
{
 ifstream myStream("C:/test.txt"); 
 if(myFlow)
 {
 int i=0,position=0; 
 //The reading is done per character 
 myFlux.clear(); 
 //initialize the playhead of 0
 //ios::beg: start from start
 myFlux.seekg(0, ios::beg); 
 char c;
 //as long as it's not the end of the file
 while(myStream.get(c))
 {
 //increment the position of the playhead
 position++; 
 //if the character matches the character of the 
 //string you are looking for in the i
 //then move to the next character
 if(c==string[i]){
 i++; 
 //if all the characters in the string are
 //checked, then we found the string in
 //the file
 if(i==strlen(string)) //strlen: returns the length of the string
 printf("The searched string is in the position: %d "
" and ends at the position %d\n,  position-strlen(string),position); 
 }
 //otherwise if we find a single character
 //that doesn't match then
 //restart from 0
 else
 i=0; 
 }
 }
 else
 printf("Unable to open file\n"); 
}

int main()
{
 char string[]="a programmer"; 
 searchFile(string); 
 system("pause"); 
}