1 // typesize.c -- 输出类型的大小 2 #include <stdio.h> 3 int main(void) 4 { 5     //C99为类型大小提供一个%zd说明符 6  7     printf("Type int has a size of %u bytes. \n", sizeof(int)); 8     printf("Type char has a size of %u bytes. \n", sizeof(char)); 9     printf("Type long has a size of %u bytes. \n", sizeof(long));10     printf("Type double has a size of %u bytes. \n", sizeof(double));11 12     return 0;13 14 }