'grep' Command implementation in C.

#include

#include

main()

{

int i,j,n,counter=0;

char file[50],str[20],buf[20];

FILE *fp;

printf("\nEnter file name with path and string :");

gets(file);

gets(str);

puts(file);

puts(str);

fp=fopen(file,"r");

while(fgets(buf,sizeof(buf),fp)!='\0')

{

if(strstr(buf,str))

{

printf("\n");

puts(buf);

counter++;

}

}

printf("\nThe number of time string find is :%d\n",counter);

fclose(fp);

}