C语言 数据类型占多少字节，指针占多少字节

#include<stdio.h>void main(){    //使用sizeof验证数据类型在内存中占用的空间大小//    char//    int//    short//    long//    unsigned int//    float//    double//    long double    printf("在64位机器中：\n");    printf("        char类型占%d个字节\n",sizeof(char));    printf("       short类型占%d个字节\n",sizeof(short));    printf("         int类型占%d个字节\n",sizeof(int));    printf("        long类型占%d个字节\n",sizeof(long));    printf("unsigned int类型占%d个字节\n",sizeof(unsigned int));    printf("       float类型占%d个字节\n",sizeof(float));    printf("      double类型占%d个字节\n",sizeof(double));    printf(" long double类型占%d个字节\n",sizeof(long double));    printf("-------------------指针占4个字节---------------------\n");    char *p0;    short *p1;    int *p2;    long *p3;    unsigned int *p4;    float *p5;    double *p6;    long double *p7;    printf("        char类型指针占%d个字节\n",sizeof(p0));    printf("       short类型指针占%d个字节\n",sizeof(p1));    printf("         int类型指针占%d个字节\n",sizeof(p2));    printf("        long类型指针占%d个字节\n",sizeof(p3));    printf("unsigned int类型指针占%d个字节\n",sizeof(p4));    printf("       float类型指针占%d个字节\n",sizeof(p5));    printf("      double类型指针占%d个字节\n",sizeof(p6));    printf(" long double类型指针占%d个字节\n",sizeof(p7));}

结果：

在64位机器中：        char类型占1个字节       short类型占2个字节         int类型占4个字节        long类型占4个字节unsigned int类型占4个字节       float类型占4个字节      double类型占8个字节 long double类型占12个字节-------------------指针占4个字节---------------------        char类型指针占4个字节       short类型指针占4个字节         int类型指针占4个字节        long类型指针占4个字节unsigned int类型指针占4个字节       float类型指针占4个字节      double类型指针占4个字节 long double类型指针占4个字节