C语言和指针-回顾01-常量大小

字符常量'M'的类型是int,大小4 bytes.

浮点数的如果没有加L(l)或者F(f),那它默认是double,大小8 bytes.

 1 #include<stdio.h>
 2 #include <stdbool.h>
 3 
 4 int main()
 5 {
 6     int * int_p = NULL;
 7     printf("char:%d,int=%d,float=%d,double=%d,long double=%d,pointer=%d\n",
 8         sizeof(char),sizeof(int),sizeof(float),sizeof(double),sizeof(long double),sizeof(int_p));
 9     printf("\'M\':%d,3.14159=%d\n",
10         sizeof('M'),sizeof(3.14159));
11 }

Output :
char:1,int=4,float=4,double=8,long double=16,pointer=8
'M':4,3.14159=8

标签：01,int,double,float,C语言,char,3.14159,sizeof,指针
来源： https://www.cnblogs.com/wuyuntana/p/14940859.html