How to marshall a string in C?

C++ string content function help!?

• trying to get the program to recognize different things in one string. and i want it to be in a function in a different class to be called to. Here is the code: #include <iostream> #include <fstream> #include <string> #include <sstream> #include <cstdlib> using namespace std; string input; bool strContains(const string inputStr, const string searchStr) { size_t contains; contains = inputStr.find(searchStr); if(contains != string::npos) return true; else return false; } class functions { public: static void test() { if(strContains(input, "go")) { printf ("True"); } else if(strContains(input, "Stay")) { printf ("False"); } } }; //Testing the string content use for calling other functions // and finding commands #include <iostream> #include <string> #include "function.cpp" using namespace std; int main() { functions p; string doing; string input; cout << "What shall we do sir?" << endl; cin >> doing; input = doing; if(strContains(input, ";")) { p.test(); } else cout << "False"; return 0; } i get 'multiple definition of 'strContains (std::string, std::string)' error and a 'multiple definition of 'input' error any ideas?

• Answer:

  There are some minor changes. Most importantly: you declared input on a global scope and in main. The local copy in main hides the global copy. Hence the find function is seeking in an empty string. Also cin needed to be replaced by getline in order to interprete a whole sentence rather than one word, only. have fun! #include <iostream> #include <fstream> #include <string> #include <sstream> #include <cstdlib> using namespace std; string input; bool strContains(const string inputStr, const string searchStr) { size_t contains; contains = inputStr.find(searchStr); return contains != string::npos ? true : false; } class functions { public: static void test() { if(strContains(input, "go")) { printf ("True"); } else if(strContains(input, "Stay")) { printf ("False"); } } }; int main() { functions p; string doing; //string input; cout << "What shall we do sir?" << endl; getline(cin, doing); input = doing; cout << "input: " << input << endl; if(strContains(input, ";")) { p.test(); } else { cout << "False"; } return 0; }