我的代码块上的 C++ 代码有什么问题？

Question

#include <iostream>
#include <string>
using namespace;

int main()
{
    string word = " ";

    do
   {
        cout << "Enter a word that has at least 5 characters: " << endl;
        cin >> word;
       }while(word.size() < 5);

        char searchCh = '0';
       cout << "Enter a character and the program will tell " <<
        "you how many times it appears in the word " << word << "." << endl;
        cin >> searchCh;

        int counter = 0;

    for(int i = 0; i < (int)word.size(); i++ )
    {
        char ch = word.at(i)

        if(searchCh == ch)
        {
            counter++; //counter = counter + 1
        }
    }

    cout << "The number of " << searchCh << " 's in the word " << word <<  " is " << counter << ".\n";


}

I continuously receive multiple errors such as: 'endl' was not declared in the scope 'cin' was not declared in this scope 'word' was not declared in this scope 'string' was not declared in this scope expected ',' or ';' before '}' token

I am using codeblocks, if anyone could answer it would be much appreciated. Thank you:D

Answer 1

One of your first lines is

using namespace;

You probably wanted to write

using namespace std;

However, please read Why is using namespace std considered bad practice?