C 语言实例 - 计算 int, float, double 和 char 字节大小

C 语言实例 - 计算 int, float, double 和 char 字节大小

C 语言实例 C 语言实例

使用 sizeof 操作符计算int, float, double 和 char四种变量字节大小。
sizeof 是 C 语言的一种单目操作符，如C语言的其他操作符++、--等，它并不是函数。
sizeof 操作符以字节形式给出了其操作数的存储大小。
实例
#include <stdio.h>

int main()
{
    int integerType;
    float floatType;
    double doubleType;
    char charType;

    // sizeof 操作符用于计算变量的字节大小
    printf("Size of int: %ld bytes\n",sizeof(integerType));
    printf("Size of float: %ld bytes\n",sizeof(floatType));
    printf("Size of double: %ld bytes\n",sizeof(doubleType));
    printf("Size of char: %ld byte\n",sizeof(charType));

    return ;
}
运行结果：
Size of int:  bytes
Size of float:  bytes
Size of double:  bytes
Size of char:  byte
计算 long long, long double 字节大小
实例
#include <stdio.h>
int main()
{
    int a;
    long b;
    long long c;

    double e;
    long double f;

    printf("Size of int = %ld bytes \n", sizeof(a));
    printf("Size of long = %ld bytes\n", sizeof(b));
    printf("Size of long long = %ld bytes\n", sizeof(c));

    printf("Size of double = %ld bytes\n", sizeof(e));
    printf("Size of long double = %ld bytes\n", sizeof(f));

    return ;
}
运行结果：
Size of int =  bytes
Size of long =  bytes
Size of long long =  bytes
Size of double =  bytes
Size of long double =  bytes