c++ - Output ASCII value of character

Question

#include <iostream>

using namespace std;

int main()
{
    char x;
    cout << "enter a character:";
    cin >> x;
    cout << "ASCII Value of " << x << "is" << string(x);
    return 0 ;
}

the error is

main.cpp||In function 'int main()':| 
main.cpp|10|error: invalid conversion from 'char' to 'const char*'| 
main.cpp|10|error:   initializing argument 1 of 'std::basic_string<_CharT, _Traits,_Alloc>::basic_string(const _CharT*, const _Alloc&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]'|
||=== Build finished: 2 errors, 0 warnings ===|

Answer 1

std::cout << "ASCII Value of " << x << "is" << (int)x;

is one way (the cast circumvents the special treatement of a char type by the I/O stream library), but this will output your platform's encoded value of the character, which is not necessarily ASCII.

A portable solution is much more complex: You'll need to encode the ASCII set in a 128 element array of elements capable of storing a 7 bit unsigned value, and map x to a suitable element of that.