Language: C++

#include<iostream>
#include<string>
using namespace std;
void tim(string &a){
     
    for(int i=0;a[i];i++){
        if(a[i]<97)
        {    a[i]=(char)(a[i]+32);     
        }   
    } 
}
int main(){
    string w,t;
    cin >>w;
    int n=w.size();
    tim(w) ;
    getline(cin,t);
    int d=0;
    while(t!="END_OF_TEXT") {
        tim(t);
        int x=0;
        while(x!=-1){
        x=t.find(w,x+1,n);
        if(x!=-1){
            d++;
            t.replace(x,n,",");  }
        }
        getline(cin,t);
    }
    cout <<d<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:17: error: no matching function for call to 'std::__cxx11::basic_string<char>::find(std::string&, int, int&)'
   23 |         x=t.find(w,x+1,n);
      |           ~~~~~~^~~~~~~~~
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_string.h:2720:9: note: candidate: 'template<class _Tp> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::_If_sv<_Tp, typename __gnu_cxx::__alloc_traits<typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_CharT>::other>::size_type> std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::find(const _Tp&, size_type) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
 2720 |         find(const _Tp& __svt, size_type __pos = 0) const
      |         ^~~~
/usr/include/c++/14/bits/basic_string.h:2720:9: note:   candidate expects 2 arguments, 3 provided
/usr/include/c++/14/bits/basic_string.h:2691:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::find(const _CharT*, size_type, size_type) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
 2691 |       find(const _CharT* __s, size_type __pos, size_type __n) const
      |       ^~~~
/usr/include/c++/14/bits/basic_string.h:2691:26: note:   no known conversion for argument 1 from 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'const char*'
 2691 |       find(const _CharT* __s, size_type __pos, size_type __n) const
      |            ~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/basic_string.h:2706:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::find(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, size_type) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
 2706 |       find(const basic_string& __str, size_type __pos = 0) const
      |       ^~~~
/usr/include/c++/14/bits/basic_string.h:2706:7: note:   candidate expects 2 arguments, 3 provided
/usr/include/c++/14/bits/basic_string.h:2740:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::find(const _CharT*, size_type) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
 2740 |       find(const _CharT* __s, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
      |       ^~~~
/usr/include/c++/14/bits/basic_string.h:2740:7: note:   candidate expects 2 arguments, 3 provided
/usr/include/c++/14/bits/basic_string.h:2758:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::find(_CharT, size_type) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
 2758 |       find(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT;
      |       ^~~~
/usr/include/c++/14/bits/basic_string.h:2758:7: note:   candidate expects 2 arguments, 3 provided