在C语言中，局部作用域是指在特定代码块内部定义的变量、函数或其他实体的可见范围。局部作用域的实体只能在其所在的代码块内部访问和使用，超出该范围将无法访问

struct tagname{
   datatype member1;
   datatype member2;
   datatype member n;
};

struct book{
   int pages;
   char author [30];
   float price;
};

#include<stdio.h>
struct{
   char name[20];
   int age;
   int salary;
   char add[30];
}emp1,emp2;
int manager(){
   struct{ //structure at local scope
   char name[20];
   int age;
   int salary;
   char add[50];
}manager ;
manager.age=27;
if(manager.age>30)
   manager.salary=650000;
else
   manager.salary=550000;
return manager.salary;
}
int main(){
   printf("enter the name of emp1:");
   //gets(emp1.name);
   scanf("%s",emp1.name);
   printf("</p><p>enter the add of emp1:");
   scanf("%s",emp1.add);
   printf("</p><p>enter the salary of emp1:");
   scanf("%d",&emp1.salary);
   printf("</p><p>enter the name of emp2:");
   // gets(emp2.name);
   scanf("%s",emp2.name);
   printf("</p><p>enter the add of emp2:");
   scanf("%s",emp2.add);
   printf("</p><p>enter the salary of emp2:");
   scanf("%d",&emp2.salary);
   printf("</p><p>emp1 salary is %d",emp1.salary);
   printf("</p><p>emp2 salary is %d",emp2.salary);
   printf("</p><p>manager salary is %d",manager());
   return 0;
}

enter the name of emp1:Bob
enter the add of emp1:Hyderabad
enter the salary of emp1:500000
enter the name of emp2:Hari
enter the add of emp2:Chennai
enter the salary of emp2:450000
emp1 salary is 500000
emp2 salary is 450000
manager salary is 550000