[程序源码]C语言实现简单计算器(VC6.0环境)

#include <stdio.h> #include <math.h> #include <stdlib.h> //预处理指令int main(void){        double bNumber, Number, Result;                //给加减乘除定义的变量        int No;                //选项的定义变量        double a, b, c, x1, x2, Rad;                //给一元一次方程定义的变量        int Ary_10;                                        //定义进制的变量        char string[32];                //二进制变量定义        system ("title: www.dotcpp.com");        while(1)        {                //界面                printf ("┏ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┓\n");                printf ("┇请选择你要计算的方法:                         ┇\n");                printf ("┣ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┫\n");                printf ("┇  加法请按_1    进制转换_5                    ┇\n");                printf ("┇  减法请按_2    求一元二次方程_6              ┇\n");                printf ("┇  乘法请按_3                                  ┇\n");                printf ("┇  除法请按_4               退出_0             ┇\n");                printf ("┗ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┅ ┛\n");                printf ("Please write down the number:");                scanf ("%d",&No);                if (No == 1)                {                        //        加法                        printf ("        请输入被加数:");                        scanf ("%lf",&bNumber);                        printf ("        请输入加数:");                        scanf ("%lf",&Number);                        Result = bNumber + Number;                        printf (" 结果是: %lf\n\n",Result);                }                else if (No == 2)                {                        //        减法                        printf ("        请输入被减数:");                        scanf ("%lf",&bNumber);                        printf ("        请输入减数:");                        scanf ("%lf",&Number);                        Result = bNumber - Number;                        printf (" 结果是: %lf\n\n",Result);                }                else if (No == 3)                {                        //        乘法                        printf ("        请输入被乘数:");                        scanf ("%lf",&bNumber);                        printf ("        请输入乘数:");                        scanf ("%lf",&Number);                        Result = bNumber * Number;                        printf (" 结果是: %lf\n\n",Result);                }                else if (No == 4)                {                        //        除法                        printf ("        请输入被除数:");                        scanf ("%lf",&bNumber);                        printf ("        请输入除数:");                        scanf ("%lf",&Number);                        Result = bNumber / Number;                        printf (" 结果是: %lf\n\n",Result);                }                else if (No == 5)                {                        //进制转换的代码                        printf("请输入需要转换的十进制数:");                        scanf("%d", &Ary_10);                        itoa (Ary_10, string ,2);                        printf("二进制: %s\n", &string);                        printf("八进制: %o\n", &Ary_10);                        printf("十六进制: %x\n", &Ary_10);                }                else if (No == 6)                {                        //求一元二次方程的解的代码                        printf("请输入一元一次方程的a,b,c三个数:");                        scanf("%lf%lf%lf",&a,&b,&c);                        Rad = b*b - 4*a*c;                        if (Rad > 0)                        {                                x1 = -b + sqrt(Rad) / (2*a);                                x2 = -b - sqrt(Rad) / (2*a);                                printf("有两个解 x1 = %lf, x2 = %lf\n", &x1, &x2);                        }                        else if (Rad == 0)                        {                                x1 = -b / (2*a);                                printf("只有一个解 x1 = %lf\n", &x1);                        }                        else                        {                                printf("无解\n");                        }                }                else if (No == 0)                {                        //        退出程序                        break;                }                else                {                        //        输入的选项不对                        printf("  请输入正确的数字。\n\n");                }                system ("pause");        //按任意键继续                system ("cls");                //清屏        }        return 0;        getchar();}