以结构类型作为函数的返回值

#include <iostream>#include<string>using namespace std;double temp;struct datatype{  char s[20];  int a;  float b;};struct datatype function(void);void main(){  cout<<"call function"<<endl;    datatype rev = function();  cout<<rev.s<<endl;  cout<<rev.a<<endl;  cout<<rev.b<<endl;}struct datatype function(void){  struct datatype samp;  strcpy(samp.s,"program");  samp.a = 256;  samp.b = 36.436;  cout<<samp.s<<endl;  cout<<samp.a<<endl;  cout<<samp.b<<endl;  return samp;}