局部变量范围

局部变量在函数中定义，例如main()函数。

#include <stdio.h> 

int main() {
   int num1; 
   printf("/nEnter a number: "); 
   scanf("%d", &num1); 
   printf("/nYou entered %d/n ", num1); 
   return 0;
}

局部范围变量与其原始函数相关联，可以在其他函数中重用变量名称。

#include <stdio.h> 
int getSecondNumber();  //function prototype 
int main()
{ 
   int num1; 
   printf("/nEnter a number: "); 
   scanf("%d", &num1); 
   printf("/nYou entered %d and %d/n ", num1, getSecondNumber()); 
} 

int getSecondNumber () 
{ 
   int num1; 
   printf("/nEnter a second number: "); 
   scanf("%d", &num1);   
   return num1; 
}