Type Conversion and Casting

Converting Between Types

int    a = 7;
double b = a;   // implicit: int -> double (safe)

double x = 3.99;
int    y = (int)x;              // C-style: 3 (truncates, not rounds)
int    z = static_cast<int>(x); // C++ style — preferred

static_cast — avoid integer division

int votes = 7, total = 10;
// Wrong: 7 / 10 = 0  (integer division)
double pct = static_cast<double>(votes) / total * 100;
// pct == 70.0

char and int are interchangeable

char c = 'A';
int  n = c;          // 65 (ASCII)
cout << (char)(c+1); // 'B'

Your Task

Write percentage(int part, int total) returning (part/total)*100 as a double.
Example: percentage(3, 4) → 75.0