函数指针
1
| void func(int a,int b , int (*func2)(int x, int y));
|
函数指针function pointer通常应用于菜单驱动的系统中。系统提示用户从菜单中选择一种操作，每个选项的操作都是由不同过的函数来完成的。指向每个函数的指针就存储在一个指针数组中。用户的选择将作为数组的下标，并且数组中的指针被用于调用相应的函数。
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| #include <stdio.h>
void function1(int a, int b);
void function2(int a, int b);
void function3(int a, int b);
int main(void)
{
void (*f[3])(int ,int) = {function1,function2,function3};
int choice;
printf("Enter a number between 0 and 2, 3 to end:");
scanf("%d",&choice);
while(choice >= 0 && choice < 3)
{
(*f[choice])(choice);
printf("Enter a number between 0 and 2, 3 to end:");
scanf("%d",&choice);
}
printf("Program execution completed.\n");
return 0;
}
void function1(int a, int b)
{
printf("You are now using function1");
}
void function2(int a, int b)
{
printf("You are now using function1");
}
void function3(int a, int b)
{
printf("You are now using function1");
}
|
