函数指针

#include <stdio.h>

int func();

int main()
{
    int (*foo)();
    /*int (*foo)() = func ;*/
    int b ;

    foo = func ;
    b = (*foo)();

    printf("%d\n",b);

    return 0 ;
}

int func()
{
    static int a = 3 ;
    a += 2 ;
    return a ;
}