Hanio

#include <stdio.h>
void hanoi(int a, int b, int c, int d){
    if (a == 1){
        printf("move %d b %d d %d\n", a, b, d );
        return  ;
    }
    hanoi(a - 1, b, d, c);
    printf("move %d b %d c %d\n", a, b, c);
    hanoi(a - 1, d, b, c);
}
int main(){
    hanoi(3, 1, 2, 3);
    return 0;
}

以上为学习过程
以下为老师教

#include <stdio.h>

void hanoi(int n, int from, int mid, int to) {
    if (n == 1) {
        printf("Move %d from %d to %d\n", n, from, to);

        return;
    }

    hanoi(n - 1, from, to, mid);
    printf("Move %d from %d to %d\n", n, from, to);
    hanoi(n - 1, mid, from, to);
}

int main() {
    hanoi(3, 1, 2, 3);

    return 0;
}