字符串的包含

#include<iostream>

#include <stdio.h>

#include <string>

using namespace std;

int getlength(char* a)

{

int length = 0;

while (*a++ != '\0')

{

length++;

}

return length;

}

bool stringcontainer(char* a, char* b)

{

int j = 0;

int ia = getlength(a);

int ib = getlength(b);

for (int i = 0; i <ib; i++)

{

for(j = 0; j < ia&&(b[i]!=a[j]); j++)

;

if (j>=ia)

return false;

}

return true;

}

//测试程序：

int main()

{

char* s1 = "AQWESF";

char* s2 = "ASD";

if (stringcontainer(s1, s2))

cout << "子集" << endl;

else

cout << "不是子集";

}