Function Overloading Dilemma

Code:

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void utils::calc(int a)  { /* different code */ }
void utils::calc(char b) { /* different code */ }

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Which function is called for calc(3) ?

Also refer to :
Function overloading in C++ - Stack Overflow

Quote:

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Originally Posted by upload

Code:

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void utils::calc(int a)  { /* different code */ }
void utils::calc(char b) { /* different code */ }

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Which function is called for calc(3) ?

Also refer to :
Function overloading in C++ - Stack Overflow

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Implicit conversions from char to int are just part of the language. C++ inherited that from C where functions such as getchar() return an int (not a char). As such the best thing to do is avoid those kinds of overloads altogether.

Sure a char can be promoted to a 32-bit int, but if the argument was a floating-point type and not a char, information would be lost.
But the idea is, how to determine which function is used ?