#include <cstdlib>

#include <iostream>

#include <ctime>

using namespace std;

int main() {

// 数字定义

short s;

int i;

long l;

float f;

double d;

// 数字赋值

s = 10;

i = 1000;

l = 1000000;

f = 230.47;

d = 30949.374;

// 数字输出

cout << "short s :" << s << endl;

cout << "int i :" << i << endl;

cout << "long l :" << l << endl;

cout << "float f :" << f << endl;

cout << "double d :" << d << endl;

cout << "sizeof : " << sizeof(long) << endl;

cout << "abs(-10) :" << abs(-10) << endl;

cout << "-------------------------------------------" << endl;

// 设置种子

srand((unsigned) time(NULL));

/* 生成 10 个随机数 */

for (i = 0; i < 10; i++) {

// 生成实际的随机数

int j;

j = rand();

cout << "随机数： " << j << endl;

}

return 0;

}