#include <bits/stdc++.h>
using namespace std;
string a[10005];
stack<double> num;
int cnt;
int main(){
    num.push(24.69);
    cout<<fixed<<setprecision(1)<<24.69<<endl;
    cout<<num.top()<<endl;
    printf("%.1f\n",24.69);
	printf("%.1f",num.top());
    return 0;
}

24.69保留一位小数不是24.6吗?

为什输出24.7啊？