这篇教程C 语言实例 - 计算 int, float, double 和 char 字节大小写得很实用，希望能帮到您。
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; 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 0;} 运行结果： Size of int: 4 bytesSize of float: 4 bytesSize of double: 8 bytesSize of char: 1 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 0;} 运行结果： Size of int = 4 bytes Size of long = 8 bytesSize of long long = 8 bytesSize of double = 8 bytesSize of long double = 16 bytes
C 语言实例 - 数值比较
C 语言实例 - 交换两个数的值 |
