Question

如何用c++编写一个子字符串在另一个字符串中出现的次数

Answer 1

#include <iostream>
#include <string>
using namespace std;

int Count(const string &a, const string &b)
{
size_t pos = 0;
int res = 0;
while ((pos = a.find(b, pos)) != string::npos)
{
++res;
++pos;
}
return res;
}

int main()
{
string a = "abcabcabctestabcabcabc";
string b = "abc";
cout << Count(a, b) << endl;
return 0;
}