16.Write a program that uses functions to perform the following operations:

C.To count the no of occurrences of a word in a given file

/* NO OF OCCURRENCE OF A WORD */

# include<iostream>

# include<fstream>

# include<string.h>

using namespace std;

int main()

    char fname[30];

    cout<<"\n enter a file";

    cin>>fname;

    fstream file;

    file.open(fname,ios::in);

    char key[30],st[30],line[30],ch;

    int i,j,c=0;

    cout<<"enter the string to be searched for";

    cin>>key;

    file.get(ch);

//cout<<"the characters read is"<<ch;

    j=0;

    i=strlen(key);

    cout<<"the length of given search string is:"<<i;

    while(file.get(ch))

        //cout<<ch;

            if(ch==key[0])

                j=0;

                while(j<i)

                        file.get(ch);

                        //cout<<ch;

                        if(ch!=key[++j])

                            break;

                if(j==1)

                    c++;

    cout<<"\nthe no. of occurence of"<<key<<"are"<<c;

    file.close();