using System;
using System.Collections.Generic; using System.Text;
namespace ConsoleApplication2 {
class Program {
static void Main(string[] args) {
char k;int a,b,c,d; Console.WriteLine(\"请输入四则运算类型：A、S、M、D分别代表如、减、乘、除\".);
k=Console.ReadLine();
if(c==A){
Console.WriteLine(\"请输入被加数A{0}\" ,A); Console.WriteLine();
Console.WriteLine(\"请输入加数B\");
Console.WriteLine();a=A+B; Console.WriteLine(\"结果是{0}\
}
if(c==S){
Console.WriteLine(\"请输入被减数A\"); Console.WriteLine();
Console.WriteLine(\"请输入减数B\");
Console.WriteLine();b=A-B; Console.WriteLine(\"结果是{0}\
}
if(c==M){
Console.WriteLine(\"请输入被乘数A\"); Console.WriteLine();
Console.WriteLine(\"请输入乘数B\");
Console.WriteLine();c=A*B; Console.WriteLine(\"结果是{0}\
}
if(c==D){
Console.WriteLine(\"请输入被除数A\"); Console.WriteLine();
Console.WriteLine(\"请输入除数B\");
Console.WriteLine();d=A/B; Console.WriteLine(\"结果是{0}\
}
} } }
