理解

#include<bits/stdc++.h>
using namespace std;
struct stu{
	string a;
	float b;
	int c;
}sum;
int main(){
	sum.a="张三";
	sum.b=98.5;
	sum.c=12; 
	cout<<sum.a<<" "<<sum.b<<" "<<sum.c;
    return 0;
}