76 lines
1.6 KiB
C++
76 lines
1.6 KiB
C++
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#include<iostream>
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#include<windows.h>
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using namespace std;
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int main(){
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float r,d,C,S;
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string danwei = "cm";
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int CIN;
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cout <<"请输入选项(默认单位cm):"<<endl;
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cout <<"1.面积"<<endl;
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cout <<"2.周长"<<endl;
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cout <<"3.改单位"<<endl;
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cout <<">>>";
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cin >> CIN;
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if (CIN == 1)
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{
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cout <<"请输入半径(若是直径,请留空):";
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cin >>r;
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if (r==Unknown)
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{
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cout <<"请输入直径:";
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cin >>d;
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if (d==Unknown)
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{
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cout <<"无数据!";
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Sleep(2000);
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return 1;
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}
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r = d/2;
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S = r*r*3.14;
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cout <<"结果:"<<S<<danwei;
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Sleep(2500);
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return 0;
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}else
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{
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S = r*r*3.14;
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cout <<"结果是:"<<S<<danwei;
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Sleep(2500);
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return 0;
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}
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}else if (CIN == 2)
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{
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cout <<"请输入直径(若是半径,请留空):";
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cin >>d;
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if (d==Unknown)
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{
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cout <<"请输入半径:";
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cin >>r;
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if (r==Unknown)
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{
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cout <<"无数据!"<<endl;
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Sleep(2000);
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return 1;
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}else
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{
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d = r*2;
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C = 3.14*d;
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cout <<"结果是:"<<C<<danwei;
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Sleep(2500);
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return 0;
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}
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}else
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{
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C = 3.14*d;
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cout <<"结果是:"<<C<<danwei<<endl;
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return 0;
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}
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}
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