1#define f1(i) ((i)*(i)) 2#define I2(f, n) f(n) + f(n+1) 3#define I3(f, n) I2(f, n) + f(n+2) 4 5#define FL_f1(i) ((i)*(i)) 6#define FL_I2(f, n) f(n) + f(n+0.2) 7#define FL_I3(f, n) FL_I2(f, n) + f(n+0.5) 8 9void main() 10{ 11 int f1 = 4; 12 int f2 = f1; 13 int f3 = f1(3); 14 int f4 = I2(f1, 0); 15 int f5 = I3(f1, 0); 16 17 highp float fl_f5 = FL_I3(FL_f1, 0.1); 18} 19 20// f5 = I3(f1, 0) 21// = I2(f1, 0) + f1(0 + 2) 22// = f1(0) + f1(0+1) + f1(0+2) 23// = 0*0 + 1*1 + 2*2 24// = 5 25 26// fl_f5 = FL_I3(FL_f1, 0.1) 27// = FL_I2(FL_f1, 0.1) + FL_f1(0.1 + 0.5) 28// = FL_f1(0.1) + FL_f1(0.1 + 0.2) + FL_f1(0.1 + 0.5) 29// = 0.1*0.1 + 0.3*0.3 + 0.6*0.6 30// = 0.46 31