C数据类型之基本类型

先来张C数据类型的图片，如下图




基本数据类型的长度，数据存储是以"字节"(Byte)为单位，数据传输是以"位"(bit)为单位，一位就代表一个0或1（二进制），一个字节（Byte）占8位(bit).

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{
@autoreleasepool {
short int shortIntType = 1;
int intType = 2;
long longType = 3L;
float floatType = 4.1f;
double doubleType = 5;
char charType = 'A';

printf("size of short it is %lu Byte\n",sizeof(shortIntType));
printf("size of int is %lu Byte\n",sizeof(intType));
printf("size of long is %lu Byte\n",sizeof(longType));
printf("size of float is %lu Byte\n",sizeof(floatType));
printf("size of double is %lu Byte\n",sizeof(doubleType));
printf("size of char is %lu Byte\n",sizeof(charType));
}
return 0;
}

输出结果如下图: