结构体与联合体的嵌套使用

本文主要是介绍结构体与联合体的嵌套使用，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

代码如下

#include <iostream>
#include <string>
using namespace std;typedef struct t_in_struct1
{int var1;int var2;
}name_in_struct1;typedef struct t_in_struct2
{int var3;int var4;
}name_in_struct2;typedef struct t_struct {int a;union {name_in_struct1 in_struct1;name_in_struct2 in_struct2;}union_name;
}name_struct;int main() {name_struct structA;structA.a = 0;structA.union_name.in_struct1.var1 = 1;structA.union_name.in_struct1.var2 = 2;structA.union_name.in_struct2.var3 = 3;structA.union_name.in_struct2.var4 = 4;cout << "0 "<<endl;cout << "structA.a = " << structA.a << endl;cout << "structA.union_name.in_struct1.var1 = " << structA.union_name.in_struct1.var1 << endl;cout << "structA.union_name.in_struct1.var2 = " << structA.union_name.in_struct1.var2 << endl;cout << "structA.union_name.in_struct2.var3 = " << structA.union_name.in_struct2.var3 << endl;cout << "structA.union_name.in_struct2.var4 = " << structA.union_name.in_struct2.var4 << endl;cout << "1 " << endl;return 0;
}

结果如下

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