C 語言實例 - 計算 int, float, double 和 char 字節(jié)大小

C 語言實例

使用 sizeof 操作符計算int, float, double 和 char四種變量字節(jié)大小。

sizeof 是 C 語言的一種單目操作符，如C語言的其他操作符++、--等，它并不是函數(shù)。

sizeof 操作符以字節(jié)形式給出了其操作數(shù)的存儲大小。

實例

#include <stdio.h> int main() { int integerType; float floatType; double doubleType; char charType; // sizeof 操作符用于計算變量的字節(jié)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 0; }

運行結(jié)果：

Size of int: 4 bytes
Size of float: 4 bytes
Size of double: 8 bytes
Size of char: 1 byte

計算 long long, long double 字節(jié)大小

實例

#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; }

運行結(jié)果：

Size of int = 4 bytes 
Size of long = 8 bytes
Size of long long = 8 bytes
Size of double = 8 bytes
Size of long double = 16 bytes

C 語言實例

相關(guān)文章

C++實戰(zhàn)