C++基础知识（三）函数

int sum(int, int);

int i=3;
test(i, ++i, i); //3个参数值分别为4, 4, 3
i=3;
test(i, i++, i); //3个参数值分别为3, 3, 3，执行完后i==4

#include "iostream.h"
#include "stdio.h"
#include "stdlib.h"
int hanoi(int n,char a,char b,char c){
    if(n==1)printf("%c -> %c\n", a, c); //final plot move form a to c
    else{
        hanoi(n-1, a, c, b); //n-1 plots move from a to b by c
        printf("%c -> %c\n", a, c); //final plot move form a to c
        hanoi(n-1, b, a, c); //n-1 plots move from b to c by a
    }
    return 0;
}

int main(int argc, char* argv[])
{
    int n;
    cin>>n;
    hanoi(n, ‘a‘, ‘b‘, ‘c‘);
    return 0;
}