Ambiguous function call when data type casting from int to char and unsigned char : cast « Data Types « C++ Tutorial

1. C++ Tutorial
2. Data Types
3. cast

#include <iostream>
using namespace std;

char myfunc(unsigned char ch);
char myfunc(char ch);

int main()
{
  cout << myfunc('c'); // this calls myfunc(char)
  //cout << myfunc(88) << " "; // ambiguous

  return 0;
}

char myfunc(unsigned char ch)
{
  return ch-1;
}

char myfunc(char ch)
{
  return ch+1;
}

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