思路简单，代码如下：

# include<iostream>

# include<string.h>

using namespace std;

bool FindFavorite( char[],char[]);

int main()

{

char phrase[80],word[15],answer[5];

bool Find_it;

do

{

cout<<"\n请输入你最喜欢的单词===>";

cin.getline(word,15);

cout<<"\n\n请输入一句话或者短语===>";

cin.getline (phrase,80);

Find_it= FindFavorite( phrase,word);

if( Find_it==true)

cout<<"\n找到了单词==>"<<word<<endl;

else

cout<<"\n未找到单词==>"<<endl;

cout<<"继续输入YES or NO";

cin.getline( answer, 5);

}

while(strcmp(answer,"yes")==0);

return 0;

}

bool FindFavorite(char phrase[],char word[])

{

bool result;

char *IsIthere;

IsIthere=strstr(phrase,word);

if (IsIthere==NULL)

result=false;

else

result=true;

return(result);

}

需要学习的是 strstr 函数。

char *strstr( char *str, const char *strSearch ); // C++ only

char *strstr( const char *str, const char *strSearch ); // C only

……

Returns the address of the first occurrence of the matching substring if successful, or NULL otherwise.