How to write a program to compare character and line

Hello Levi Jeensen ,

Comparing and counting character and line of a text file

The program codes are below

#include<stdio.h>
#include<string.h>

int main()
{
    FILE *ptr_file;
    char buf[200];
    char key[] = "test";
    int wordcount = 0;

    ptr_file = fopen("input.txt","r");

    while (fgets(buf,200, ptr_file)!=NULL)
    {
        if((strstr(buf,key)) !=NULL){
            wordcount++;
        }
    }
    fclose(ptr_file);
    printf("%d",wordcount);
}

Thanks.