#include<bits/stdc++.h> using namespace std; int sum; int main(){ int a,b,c; cin>>a>>b>>c; if(a+b>c&&b+c>a&&c+a>b){ cout<<"yes"; } else{ cout<<"no"; } return 0; }

#include <iostream> using namespace std; int main(){ int a,b,c; cin>>a>>b>>c; if((a+b)>c&&(a+c)>b&&(c+b)>a) { cout<<"yes"; } else { cout<<"no"; } return 0; }

题解

#include <iostream> using namespace std; int main(){ double a,b,c; cin >> a >> b >> c; if(((a+b)>c) and ((a+c)>b) and ((b+c)>a)) { cout << "yes"; }else{ cout << "no"; } return 0; }

#include <iostream> using namespace std; int main(){ int a,b,c; cin>>a>>b>>c; if((a+b)>c&&(a+c)>b&&(c+b)>a) { cout<<"yes"; } else { cout<<"no"; } return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c; cin>>a>>b>>c; if((a+b)>c and (b+c)>a and (c+a)>b){ cout<<"yes"; } else cout<<"no"; return 0; }

#include <bits/stdc++.h> using namespace std; int main(){ int x,y,z; cin >> x >> y >> z; if(x+y>z && x+z>y && z+y>x){ cout << "yes"; }else{ cout << "no"; } return 0; }

#include <bits/stdc++.h> using namespace std; long long a,b,c; void triangle() { if(a+b>c and a+c>b and b+c>a) cout<<"yes"; else cout<<"no"; } int main(){ cin>>a>>b>>c; triangle(); return 0; }

#include<bits/stdc++.h> using namespace std; bool is_tri(int a[]){ sort(a+1,a+4); if(a[1]+a[2]>a[3]){ return 1; } return 0; } int main(){ int a[4]; for(int i=1;i<=3;i++){ cin>>a[i]; } if(is_tri(a)){ cout<<"yes"; } else cout<<"no"; return 0; }

首先，我们先写好基本框架: 接着创建3个变量: 然后写个if-else,注意条件(t1+t2>t3 && t2+t3>t1 && t3+t1>t2): 最后，结合起来(答案): 保证让你得AC！

#include<iostream> using namespace std; int main(){ long long a,b,c; cin>>a>>b>>c; if(a+b>c&&a+c>b&&b+c>a){ cout<<"yes"; } else{ cout<<"no"; } return 0; }

逆思想 #include<iostream> using namespace std; int main (){ int a,b,c; cin>>a>>b>>c; if(a+b<=c||a+c<=b||b+c<=a)cout<<"no"; else cout<<"yes"; }

#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c; if(a+b>c&&a+c>b&&c+b>a){ cout<<"yes"; } else{ cout<<"no"; } }

#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c; cin>>a>>b>>c; if(a+b>c && a+c>b && b+c>a){ cout<<"yes"; } else{ cout<<"no"; } }