你的else(month==2){明顯不對啊，改為else if(month == 2) {程序語法上就沒有問題，可以編譯運行了但程序結構明顯不合理，類似這類需求，不應該用if,要用switch case完成的

按你的程序，修正了你的疏忽，程序可以編譯運行了，運行例如下：修改后的程序如下：#include<iostream>using namespace std;int main(){int month,day;cout<<"請輸入你的出生月份和出生日，比如：1 1，（月份在前，日在后，中間要有空格）。"<<endl;cout<<"這樣就可以測出你的星座了！"<<endl;cin>>month>>day;if(month==3){if(day>=21&&day<=31){cout<<"白羊座"; }else if(day>=1&&day<=20){cout<<"雙魚座"; }else{cout<<"此月沒有這一天喲！"; }}else if(month==4){if(day>=20&&day<=30){cout<<"金牛座";}else if(day>=1&&day<=19){cout<<"白羊座"; }else{cout<<"此月沒有這一天喲！"; }}else if(month==5){if(day>=21&&day<=31){cout<<"雙子座"; }else if(day<=20&&day>=1){cout<<"金牛座"; }else{cout<<"此月沒有這一天喲！"; }}else if(month==6){if(day>=22&&day<=30){cout<<"巨蟹座"; }else if(day<=21&&day>=1){cout<<"雙子座"; }else{cout<<"此月沒有這一天喲！"; }}else if(month==7){if(day>=23&&day<=31){cout<<"獅子座";}else if(day<=22&&day>=1){cout<<"巨蟹座";}else{cout<<"此月沒有這一天喲！"; }}else if(month==8){if(day>=23&&day<=31){cout<<"處女座"; }else if(day<=22&&day>=1){cout<<"獅子座"; }else{cout<<"此月沒有這一天喲"; }}else if(month==9){if(day>=23&&day<=30){cout<<"天秤座";}else if(day<=22&&day>=1){cout<<"處女座";}else{cout<<"此月沒有這一天喲！"; }}else if(month==10){if(day>=24&&day<=31){cout<<"天蝎座";}else if(day<=23&&day>=1){cout<<"天秤座"; }else{cout<<"此月沒有這一天喲！";}} else if(month==11){if(day>=23&&day<=30){cout<<"射手座";}else if(day<=22&&day>=1){cout<<"天蝎座"; }else{cout<<"此月沒有這一天喲！"; }}else if(month==12){if(day>=22&&day<=31){cout<<"摩羯座";}else if(day<=21&&day>=1){cout<<"射手座";}else{cout<<"此月沒有這一天喲！"; }}else if(month==1){if(day>=20&&day<=31){cout<<"水瓶座";}else if(day<=19&&day>=1){cout<<"摩羯座"; }else{cout<<"此月沒有這一天喲！"; }}else if(month==2){if(day>=19&&day<=29){cout<<"雙魚座"; }else if(day<=18&&day>=1){cout<<"水瓶座";}else{cout<<"此月沒有這一天喲！"; }} return 0;}主要是修改后面的　else (month==2){改為：else if(month==2){

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