如何在C++中执行std :: string indexof,返回匹配字符串的索引？

试试这个find功能.

以下是我链接的文章中的示例:

 string str1( "Alpha Beta Gamma Delta" );
 string::size_type loc = str1.find( "Omega", 0 );
 if( loc != string::npos ) {
   cout << "Found Omega at " << loc << endl;
 } else {
   cout << "Didn't find Omega" << endl;
 }

从你的例子中不清楚你在搜索"bob"中的String,但是这里是如何使用find在C++中搜索子字符串.

string str1( "Alpha Beta Gamma Delta" );
string::size_type loc = str1.find( "Omega", 0 );

if( loc != string::npos )
{
   cout << "Found Omega at " << loc << endl;
}
else
{
   cout << "Didn't find Omega" << endl;
}