// Warning: this program uses gets(), which is unsafe.

// I WANT TO REPLACE GETS BECAUSE IT IS UNSAFE

// I NEED HELP PLEASE

#include

using namespace std;

//searcher prototype

char *searcher (char *source, char *charSet);

int main()

{

char s1[50], s2[50]; //to hold input strings

char choice; //to store user choice y or n

while(true)

{

cout << "Please enter source string: " << endl; //ask user to enter source string

gets(s1); //store it in s1

cout<< "Please enter Char set string: " << endl; // ask user to enter charset string

gets(s2); //store it in s2

cout << "The Source String " << s1 << endl; //print s1

cout << "The Char set string " << s2 << endl; //print s2

cout << "The Address of source string " << &s1 << endl; //print address of s1

//call searcher function and store returned pointer in c

char *c = searcher(s1,s2);

//if c is not null then print sub string

if(c != NULL)

{

cout << "The Substring found by searcher " << c << endl;

}

//if c is null print unsuccessful search

else

cout << " Unsuccessful search " << endl;

cout << endl;

cout << " Do you want to continue? y or n " << endl; //ask user to continue or not

cin >> choice; //get input

//if choice is n or N terminate program

if(choice=='n'||choice=='N')

break;

cin.ignore();

}

return 0;

}

//searcher function

char *searcher (char *source, char *charSet)

{

//for each character in source till end of string

while(*source != '\0')

{

char *temp = charSet; //take a temporary pointer to charSet

//compare each char of source with all chars of temp

while(*temp != '\0')

{

//if any match found return pointer to that character

if(*temp == *source)

return source;

temp++; //move to next char

}

source++; //move to next char in source

}

return NULL; //if no match found return NULL

}