1 #include <stdio.h>
2
3 double add(double a, double b)
4 {
5 return a + b;
6 }
7
8 double sub(double a, double b)
9 {
10 return a - b;
11 }
12
13 double mul(double a, double b)
14 {
15 return a * b;
16 }
17
18 double div(double a, double b)
19 {
20 return a / b;
21 }
22
23 typedef double (*func)(double, double);
24
25 double calc(double a, double b, func oper)
26 {
27 double c;
28 c = oper(a, b);
29 return c;
30 }
31
32 double main(double argc, char* argv[])
33 {
34 double a = 1234.565, b = 36.45, c;
35
36 c = calc(a, b, add);
37 printf("加法运算: %f + %f = %f\n", a, b, c);
38
39 c = calc(a, b, sub);
40 printf("减法运算: %f - %f = %f\n", a, b, c);
41
42 c = calc(a, b, mul);
43 printf("乘法运算: %f * %f = %f\n", a, b, c);
44
45 c = calc(a, b, div);
46 printf("除法运算: %f / %f = %f\n", a, b, c);
47
48 return 0;
49 }
