#include <stdio.h> #include <string.h> typedef union Person { char name[10]; int age; } pinfo; int main() { pinfo man1; strcpy(man1.name, "Jerry"); printf("%s ", man1.name); //.name, .age共用一个内存单元,赋值后要立即输出,否则值就没了。并且一次只能对一个union变量赋值 man1.age = 24; printf("%d ", man1.age); return 0; }