index of value in table .c++

[jafra]

I have to create a function which receives in parameter an array of characters and a character. it must return the positions of this character in the array. I have prepared this code but it does not work on codeblocks. yet it works with dev ++. who can help me?

  void repererposition(char t[], char c)
{
int i=0;
cout<<"\n La lettre  "<<c<<"  apparait aux positions : ";
while(t[i]!='\0')
{

if(t[i]==c)
cout<<i<<"\t";i++;

}
cout<<endl;
}

[Ganado]

What is the error you get while working within codeblocks? It sounds like you're having more of an IDE issue and not a code issue. Show the full code (with main).

[seeplus]

it must return the positions of this character in the array.

Then the above code, even if working with dev++, is not what is required as it doesn't return anything. However, to just display the character positions then:

void repererposition(const char t[], char c)
{
	std::cout << "\n La lettre  " << c << "  apparait aux positions : ";

	for (auto p {t}; p && *p; ++p)
		if (*p == c)
			std::cout << p - t << '\t';

	std::cout << '\n';
}

[JLBorges]

#include <cstring>

// return the position of the character in the c-style string
// return -1 if the character is not found
inline std::ptrdiff_t repererposition( const char cstr[], char ch )
{
    if( cstr != nullptr && ch != 0 )
    {
        // https://en.cppreference.com/w/cpp/string/byte/strchr
        const auto ptr = std::strchr( cstr, ch ) ;
        if( ptr != nullptr ) return ptr - cstr ;
    }

    return -1 ; // the character is not found
}