Finding string in another string

# include <stdio.h>
# include <conio.h>
# include <string.h>
main(){     /* finding fstr in str */
char str[]="i love c , i love cpp  and i love java";
char fstr[]="love";
int i,j,k,L,flag=0;
clrscr();
for(L=0;str[L]!=0;L++);

for(i=0;i<L;i++)
{
for(k=0,j=i;fstr[k]!=0;k++,j++)
{
if(str[j]!=fstr[k])
break;
}
if(k==strlen(fstr))
printf("\n'%s' found at %d",fstr,i+1,flag++);
}
if(flag==0)
printf("\nNot found");
else
printf("\n'%s' Found %d times",fstr,flag);

}