题解 | #统计字符串中子串出现的次数#

#include <iostream>
#include <string.h>
using namespace std;
#include <algorithm>
int  my_strstr(const char* str1, const char* str2) {
	const char* s1 = NULL;
	const char* s2 = NULL;
	const char* cp = str1;
	if (*str2 == '\0') {
		return 0;
	}
    int count=0;
	while (*cp) {
		s1 = cp;
		s2 = str2;
		while (*s1 && *s2 && (*s1 == *s2)) {
			s1++;
			s2++;
		}
		if (*s2 == '\0') {
			count++;
		}
		cp++;
	}
    return count;
	

}
int main() {

    char str[100] = { 0 };
    char substr[100] = { 0 };

    cin.getline(str, sizeof(str));
    cin.getline(substr, sizeof(substr));

    int ret=my_strstr(str,substr);
    cout<<ret;
        

    return 0;
}