C语言编程：从键盘输入两个实数后，屏幕显示菜单如下内容？
#include<stdio.h>
char *Text[] = {"退出", "两数之和",
"两数之差", "两数乘积",
"两数相乘之商"};
int main(void)
{
double n1, n2, result;
int choice;
printf("请输入两个实数：");
scanf("%lf%lf", &n1, &n2);
while(1)
{
for(int i = 1; i < sizeof(Text)/sizeof(char *); i++)
printf("%d.%s%s
", i, "输出", Text[i]);
printf("5.%s
", Text[0]);
printf("请输入你的选择： ");
scanf("%d", &choice);
if(choice == 5)
{
printf("退出关闭程序
");
return 0;
}
if(choice < 0 || choice > 4)
{
printf("抱歉，查无此选项
");
continue;
}
switch(choice)
{
case 1:
{
result = n1 + n2;
break;
}
case 2:
{
result = n1 - n2;
break;
}
case 3:
{
result = n1 * n2;
break;
}
case 4:
{
result = n1 / n2;
break;
}
}
printf("%s%s：%.2lf
", Text[choice], "为", result);
}
return 0;
}
#include <stdio.h>
#include <stdlib.h>
int main()
{
double a,b;
int c;
while(1)
{
printf("请输入两个实数:");
scanf("%lf%lf",&a,&b);
printf("1.输出两数之和
");printf("2.输出两数之差
");printf("3.输出两数乘积
");printf("4.输出两数相除之商
");printf("5.退出
");printf("请输入你的选择:");
scanf("%d",&c);
switch(c)
{
case 1:printf("两数之和为 %g
",a+b);break;case 2:printf("两数之差为 %g
",a-b);break;case 3:printf("两数乘积为 %g
",a*b);break;case 4:printf("两数相除之商为 %g
",a/b);break;case 5:printf("关闭退出程序
");exit(0);default:printf("抱歉,查无此选项
");break;}
}
return 0;
}
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