001 // 線形補間 
002 #define SPLINE_ARRAY_SIZE 4 
003 double calc_liner(double v, const double x[SPLINE_ARRAY_SIZE], const double y[SPLINE_ARRAY_SIZE]) 
004 { 
005  int index = 0; 
006  double x1, x2, y1, y2, xs, t; 
007  
008  while(index < SPLINE_ARRAY_SIZE - 2 && x[index + 1] < v) 
009  ++index; 
010  
011  x1 = x[index]; 
012  x2 = x[index + 1]; 
013  xs = x2 - x1; 
014  if(xs == 0) return y[index]; 
015  
016  t = (v - x1) / xs; 
017  y1 = y[index]; 
018  y2 = y[index + 1]; 
019  
020  return (y2 - y1) * t + y1; 
021 } 

 
001 int main() 
002 { 
003  const double value_a[SPLINE_ARRAY_SIZE] = { 0.8, 0.85, 0.9, 1.0 }; 
004  const double value_b[SPLINE_ARRAY_SIZE] = { 0.5, 0.7, 0.8, 0.9 }; 
005  double v, result; 
006  
007  for(v=0.7; v<1.101; v+=0.01) 
008  { 
009  result = calc_liner(v, value_a, value_b); 
010  printf("%4.2f = %f\n", v, result); 
011  } 
012  
013  return 0 
014 } 

void student::set_age(int)

{

    age = set_age;

}

void student::set_age(int a)

{

    age = a;

}

obj.set_name(char p);

name[0] = '\0';

name = 0;

void student::set_name(char *n)

{

    if(!n)   return;

    

    delete name;

    size_t nameLength = strlen(n);

    name = new char[nameLength + 1];

    

    strcpy(name, n);

}