步骤：定义，输入 判断，输出

#include<iostream> using namespace std; int main(){ int t; cin >> t; if(t < 0){ cout << "固体"; } if(t == 0){ cout << "固液共存"; } if(t > 0 && t < 100){ cout << "液体"; } if(t == 100){ cout << "液气共存"; } if(t > 100){ cout << "气体"; } return 0; }

#include <bits/stdc++.h> using namespace std; int main(){ int t; cin>>t; if(t<0){ cout<<"固体"; } else if(t0){ cout<<"固液共存"; } else if(t>0&&t<100){ cout<<"液体"; } else if(t100){ cout<<"液气共存"; } else{ cout<<"气体"; } return 0; }

#include<iostream> using namespace std; int main(){ int t; cin >> t; if(t < 0){ cout << "固体"; } if(t == 0){ cout << "固液共存"; } if(t > 0 && t < 100){ cout << "液体"; } if(t == 100){ cout << "液气共存"; } if(t > 100){ cout << "气体"; } return 0; }