C语言函数指针示例

 

 

#include <stdio.h>

double add(double a, double b)
{
    return a + b;
}

double sub(double a, double b)
{
    return a - b;
}

double mul(double a, double b)
{
    return a * b;
}

double div(double a, double b)
{
    return a / b;
}

typedef double (*func)(double, double);

double calc(double a, double b, func oper)
{
    double c;
    c = oper(a, b);
    return c;
}

double main(double argc, char* argv[])
{
    double a = 1234.565, b = 36.45, c;

    c = calc(a, b, add);
    printf("加法运算: %f + %f = %f\n", a, b, c);

    c = calc(a, b, sub);
    printf("减法运算: %f - %f = %f\n", a, b, c);

    c = calc(a, b, mul);
    printf("乘法运算: %f * %f = %f\n", a, b, c);

    c = calc(a, b, div);
    printf("除法运算: %f / %f = %f\n", a, b, c);

    return 0;
}