/********函数指针***********/

int max(int a, int b) {
if (a > b) return a;
else return b;
}
int main() {
int max()(int a, int b);
int (*pmax)();
int x, y, z;
pmax = max;
printf("input two numbers: \n");
scanf("%d%d", &x, &y);
z = (*pmax)(x, y);
printf("maxnum=%d", z);
return 0;
}

/******指针函数*********/

int main() {
int i;
char* day_name(int n);
printf("input day no:\n");
scanf("%d", &i);
if (i < 0)
exit(1);
printf("day no: %2d-->%s\n", i, day_name(i));
return 0;
}
char* day_name(int n) {
static char* name[] = {
"Illegal day",
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday",
"Sunday"
};
return (n < 1 || n > 7) ? name[0] : name[n];
}

/*****************************************/

int*(*(*a)())[10];//a是一个函数指针变量，该函数返回一个指针值，该指针值指向一个数组，该数组元素为int型指针。

C指针入门