函数指针和指针函数

1.函数指针

不说废话，函数指针格式

指针类型 (*指针名)(参数1, 参数2, ......)

比如

#include <stdio.h>
void fun1(int a) {printf("a is %d. this funtion is fun1",a);
}
void fun2(int b) {printf("b is %d. this funtion is fun2",b);
}
void fun3(int c) {printf("c is %d. this funtion is fun3",c);
}
void (*point)(int);
int main() {point = fun2;point(3);
}

输出

the b is 3. this funtion is fun2

2.指针函数

指针函数格式

函数类型 (*指针名)(参数1, 参数2, ......)

比如

#include <stdio.h>
void fun1(int a) {printf("a is %d. this funtion is fun1",a);
}
void fun2(int b) {printf("b is %d. this funtion is fun2",b);
}
void fun3(int c) {printf("c is %d. this funtion is fun3",c);
}
void (*point())(int) {return fun1;
}
int main() {void(*point2)(int) = point();point2(5);
}

输出

a is 5. this funtion is fun1