C++ String Tokenising

main.cpp

#include <iostream>
#include <cstring>
using namespace std;

vector<string> split(string str,const char *delim){
	// Convert from char * to char
	char *cexp = new char[str.length() + 1]; // 1 extra char of null terminated character
	strcpy(cexp, str.c_str());
	// Tokenise character array
	char *tok = strtok(cexp, delim);
	vector<string> tokens;
	while(tok != NULL){
		tokens.push_back(string(tok));
		tok = strtok(NULL, delim);
	}
	delete[] cexp;
	return tokens;
}

char* mystrtoken(char *s, char delim){
    static char *input = NULL;
    if(s != NULL){
        input = s;
    }
    if(input == NULL){
        return NULL;
    }
    char *output = new char[strlen(input) + 1];
    int i = 0;
    for(; input[i] != '\0'; i++){
        if(input[i] != delim){
            output[i] = input[i];
        }else{
            input = input + i + 1; // update input
            output[i] = '\0';
            return output;
        }
    }
    output[i] = '\0';
    input = NULL;
    return output;
}

int main() {
    // String Tokenising
    char s[100] = "Today is a rainy day";
    char *tokenPtr = strtok(s," ");
    while(tokenPtr != NULL){
        cout << tokenPtr << "\n";
        tokenPtr = strtok(NULL, " "); // we are passing null so that this function points to previously passed string
    }
    return 0;
}