#include <stdio.h>
// data type 数据类型
int main()
{
/*
float number_float = 10.0;
int number1 = 19;
int number2 = 10;
printf(" %d / %d = %f\n\n",number1,number2,number1/number2);
printf(" %d / %d = %f\n\n",number1,number2,(float)number1/number2);//强制转换
*/
//char number = 'a';
int number1 = 2;
int</