C++输出小数点

#include <iostream>
#include <iomanip>//小数点必带这个头文件

using namespace std;

int main(){

    double t = 552.54467;
    double a = 3.1544545454;
    int b = 244;

    cout<<t<<" "<<fixed<<setprecision(2)<<a<<" "<<t;
}