C语言整型大小

//* typesize.c -- prints out type sizes */
#include <stdio.h>
int main(void)
{
    /* c99 provides a %zd specifier for sizes */
    printf("Type int has a size of %zd bytes.\n", sizeof(int));
    printf("Type char has a size of %zd bytes.\n", sizeof(char));
    printf("Type long has a size of %zd bytes.\n", sizeof(long));
    printf("Type long long has a size of %zd bytes.\n",
           sizeof(long long));
    printf("Type double has a size of %zd bytes.\n",
           sizeof(double));
    printf("Type long double has a size of %zd bytes.\n",
           sizeof(long double));
    return 0;
}