2 solutions

  • 0
    @ 2022-11-26 17:40:51
    #include<iostream>
    #include<iomanip>
    using namespace std;
    
    int main(){
    	int n, x, cnt1 = 0, cnt2 = 0;  //总人数,分数,及格人数,优秀人数
    	float ratio1, ratio2; //及格率, 优秀率
    	cin >> n;
    	
    	for(int i = 1; i <= n; i++){
    		cin >> x;
    		if(x >= 60)  cnt1++;
    		if(x >= 85)  cnt2++;
    	}
    	
    	ratio1 = 1.0 * cnt1/n * 100;   //因为cnt1 和 n 都为整数,所以乘以1.0转成浮点数
    	ratio2 = 1.0 * cnt2/n * 100;
    	cout << setprecision(0) << fixed << ratio1 << "%\n"<<ratio2 << "%\n" << endl;  //四舍五入,保留整数
    	return 0;
    }
    
    • 0
      @ 2022-4-8 17:30:10
      
      //stl:int round(double x)   ----->四舍五入函数
      #include<bits/stdc++.h>
      using namespace std;
      int n,a,b,x;
      int main(){
      	//freopen("t.in","r",stdin);
      	//freopen("t.out","w",stdout);
          cin>>n;
          int tmp=n;
          while(tmp--){
          	cin>>x;
          	if(x>=60)b++;
          	if(x>=85)a++;
          }
          double ans1=(double)b/n*100;
          double ans2=(double)a/n*100;
          cout<<round(ans1)<<"%"<<endl;
      	cout<<round(ans2)<<"%";
      	return 0;
      }
      • 1

      Information

      ID
      6482
      Time
      1000ms
      Memory
      256MiB
      Difficulty
      3
      Tags
      # Submissions
      101
      Accepted
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