s++. break case 15: cout<<"sizeof(long double)="<<sizeof(long double)<<byte(s)"<<\n s++ break. f(k=0)break 3.参考程序 #include <iostream. h> bcx: cout<<"Input(a, b, c)= if(a>b&&b<c)x=b else if(a>c)x=c else x=a: cout<<"min("<a<<","<b<<"<<<<")"<<X<endl;s++;break; case 15:cout<<"sizeof(long double)="<<sizeof(long double)<<"byte(s)"<<'\n'; s++;break; } if(k==0)break; } } 3．参考程序： #include <iostream.h> void main(){ int a,b,c,x; cout<<"Input(a,b,c)="; cin>>a>>b>>c; if(a>b&&b<c)x=b; else if(a>c)x=c; else x=a; cout<<"min("<<a<<","<<b<<","<<c<<")="<<x<<endl; }