求指导
#include<stdio.h>
main()
{
int a, b;
a = 10; b = 5;
{int a = 20;
printf("%d\n",a);
b++;}
printf("%d\n", a);
printf("%d\n", b);
}
为啥输出为20 10 6啊
求指导
#include<stdio.h>
main()
{
int a, b;
a = 10; b = 5;
{int a = 20;
printf("%d\n",a);
b++;}
printf("%d\n", a);
printf("%d\n", b);
}
为啥输出为20 10 6啊
你想要打印什么样的,{}里面是局部范围。你在{}里面定义的a=20输出20,出了{}后此时a=10,b++变成了6。所以你的屏幕打印20 10 6。以下程序也是打印20 10 6
#include<stdio.h>
int main()
{
int a = 0;
int b = 0;
a = 10;
b = 5;
printf("%d\n", a);
printf("%d\n", b);
a = 20;
b++;
printf("%d\n", a);
printf("%d\n", b);
return 0;
}