c语言的奇葩书写,不断总结

1.

*100=25;

*(int *)100=25;上面语句非法,下面语句把100字面值转成指针再解引用.

2.

int a[]={1,2,3,4,5};

a[0]=100;

*a=200;*(a+1)=300;

3[a]=400;//囧合法;

3.

int calender[12][31];

int *p;

int i;i = calender[4][7];

i = *(calender[4]+7);

i = *(*(calender+4)+7);//全等价;p=calender;//errorint (*ap)[31];//okap = calender;

4.

float f = 1.2f;

int i=(int)f;

i=int(f);

5.

int x = 22;
int main(){
    int x = 10;
    {
        int x = 3;
        cout<<x<<endl;
    }
    cout<<x<<endl;
    cout<<::x<<endl;
    return 0;
}

6.