C ++ strtok函数拆分词

Question

i am to write a function called splitLine() in c++. can someone please help? im really confused

splitLine () {

    string temp = aLine;
    string *tempLine =  strtok(temp, " ");
    free(temp)
    countNum = sizeOf(tempLine);

   }

Answer 1

You're misunderstanding the instructions.

The strtok function operates on nul terminated char arrays (aka C strings) not C++ strings. So create a temporary 'string' actually means this

// create temporary string which is a copy of aLine
char* temp = new char[aLine.size() + 1];
strcpy(temp, aLine.c_str());

// extract words from temp
...

// free temporary string
delete[] temp;

Breaking the temporary string into words with strtok means writing a loop . strtok will extract one word at a time. I'm sure you can find examples of this on the internet. So I'll leave that to you.