#include <iostream>
using namespace std;
char *get_substr(char *sub, char *str);
int main()
{
char *substr;
substr = get_substr("three", "one two three four");
cout << "substring found: " << substr;
return 0;
}
// Return pointer to substring or null if not found.
char *get_substr(char *sub, char *str)
{
int t;
char *p, *p2, *start;
for(t=0; str[t]; t++) {
p = &str[t];
start = p;
p2 = sub;
while(*p2 && *p2==*p) { // check for substring
p++;
p2++;
}
/* If at end of p2 (i.e., substring), then a match has been found. */
if(!*p2)
return start; // return pointer to beginning of substring
}
return 0;
}
/*
Quote from: C++: A Beginner's Guide, Second Edition
# Publisher: McGraw-Hill Osborne Media; 2 edition (December 3, 2003)
# Language: English
# ISBN-10: 0072232153
# ISBN-13: 978-0072232158
*/
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