1 成绩统计
代码语言：javascript
复制#include <iostream>using namespace std;int main(){ int n; cin >> n; int cnt1 = 0, cnt2 = 0, cnt3 = 0, cnt4 = 0; int a[n]; for(int i = 0; i < n; i ) { cin >> a[i]; if(a[i] >= 90 && a[i] <= 100) { cnt1 ; } else if(a[i] >= 80 && a[i] <= 89) { cnt2 ; } else if(a[i] >= 60 && a[i] <= 79) { cnt3 ; } else { cnt4 ; } } cout << "You " << cnt1 << endl; cout << "Liang " << cnt2 << endl; cout << "Zhong " << cnt3 << endl; cout << "Cha " << cnt4 << endl; return 0;}
2 打印图形
代码语言：javascript
复制#include <iostream>using namespace std;int main(){ int n; cin >> n; for(int i = 1; i <= 2 * n - 1; i ) { int j = (i > n) ? 2 * n - i : i; for(int k = 1; k < j; k ) { cout << ' '; } char c; for(c = 'A' j - 1; c < 'A' n; c ) { cout << c; } for(c = c - 2; c >= 'A' j - 1; c--) { cout << c; } cout << endl; } return 0;}
3 数值计算
代码语言：javascript
复制#include<bits/stdc .h>using namespace std;bool isprime(int a){ if(a == 1) { return false; } for(int i = 2; i <= sqrt(a); i ) { if(a % i == 0) { return false; } } return true;}int main(){ int l, r, sum = 0; cin >> l >> r; for(int i = l; i <= r; i ) { if(isprime(i) && sqrt(i / 100) - (int)sqrt(i / 100) == 0 && sqrt(i % 100) - (int)sqrt(i % 100) == 0) { cout << i << endl; sum ; } } cout << sum << endl; return 0;}
