strstr in c

1#include <stdio.h>
2#include <string.h>
3
4int main() {
5   char str1[100] = "This is ", str2[] = "A Name";
6
7   // concatenates str1 and str2
8   // the resultant string is stored in str1.
9   strcat(str1, str2);
10
11   puts(str1);
12   puts(str2);
13
14   return 0;
15}

1#include <stdio.h>
2
3int main(void) {
4  char name[] = "Harry Potter";
5
6  printf("%c", *name);     // Output: H
7  printf("%c", *(name+1));   // Output: a
8  printf("%c", *(name+7));   // Output: o
9
10  char *namePtr;
11
12  namePtr = name;
13  printf("%c", *namePtr);     // Output: H
14  printf("%c", *(namePtr+1));   // Output: a
15  printf("%c", *(namePtr+7));   // Output: o
16}

1//stdin accesses the keyboard, it's a file pointer

1char *strstr(const char *haystack, const char *needle)
2\\returns *needle if found, NULL if not