想知道"摆渡"技术和"轮渡"技术的详细资料

#include<stdio.h>
#include<stdlib.h>
int main()
{
char a[3]={'1','2','3'};
int b[3]={1,2,3};
float c[3]={1.1,2.1,3.1};
long d[3]={1,2,3};
printf("char : sizeof is %d\n",sizeof(a));
printf("integer: sizeof is %d\n",sizeof(b));
printf("float : sizeof is %d\n",sizeof(c));
printf("long: sizeof is %d\n",sizeof(d));
return 0;
}