若输入数据为:5 3 2 1 5 4 则if(a[j]<a[tmp])这句话中的条件会成立()次（即后面的tmp=j会执行多少次）。

#include<iostream>

#include<cstring>

#include<cstdio>

#define N 500+10

using namespace std;

int a[N], n;

int main() {

    cin >> n;

    for ( int i = 1; i <= n; i++) cin >> a[i];

    for ( int i = 1; i < n; i++)

        for ( int j = i+1; j <= n; j++) {

            int tmp = i;

            if(a[j] < a[tmp]) tmp = j;

            swap( a[i], a[tmp] );

        }

    for ( int i = 1; i <= n; i++) cout << a[i] << " ";

    cout << endl;

    return 0;

}