字符串处理系列：输入任何一串字符串，计算其中ABC子字符串的个数

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#include<cstring>
#include<iostream>
using namespace std;
int coutABC(char *s)
{

char *sub = "ABC";
char *teststr=s;
int cnt = 0;
char *p = teststr;

while (*p)
{

if (strncmp(p, sub, 3) == 0)

{

p += 3;

cnt++;

}

else

p++;

}

return cnt;

}
int main()
{

char checkstr[100];
cout << "请输入字符串" << endl;
cin.getline(checkstr, 80);
cout << "ABC的个数: " << coutABC(checkstr) << endl;
return 0;

}