C语言数据类型大小（万不可背，用的时候亲测就行）

#include <stdio.h>
#include <conio.h>

int main()
{
int test[5] = {0};

printf("the size of char is %d byte\n", sizeof(char));
printf("the size of int is %d byte\n", sizeof(int));
printf("the size of float is %d byte\n", sizeof(float));
printf("the size of double is %d byte\n", sizeof(double));
printf("the size of long is %d byte\n\n", sizeof(long));

for (int i = 0; i < sizeof(test)/sizeof(int); i++)
{
printf("the address of test[%d] is: %x\n",i,&test[i]);
}

getch();
}