0725 c++笔记

Switch语句

1.考试成绩

  1. #include <iostream>
  2. using namespace std;
  3. int main() {
  4.     char a;
  5.     cin>>a;
  6.     switch (a) {
  7.     case 'A':
  8.         cout << "100-90";
  9.         break;
  10.     case 'B':
  11.         cout << "89-80";
  12.         break;
  13.     case 'C':
  14.         cout << "79-70";
  15.         break;
  16.     case 'D':
  17.         cout << "69-60";
  18.         break;
  19.     case 'E':
  20.         cout << "额你的成绩很难评";
  21.         break;
  22.     default:
  23.         cout << "大妈你在输什么?";
  24.         break;
  25.     }
  26. }

for循环

2.最高分

Created with Raphaël 2.1.2开始int max=0,i=1;输入ni<=n输入ss>maxmax=si=i+1输出max的值结束yesnoyesno
  1. #include <iostream>
  2. using namespace std;
  3. int main() {
  4.     int n, s;
  5.     int max = 0;
  6.     cin >> n;
  7.     for (int i = 1; i <= n; i++) {
  8.         cin >> s;
  9.         if (s > max) {
  10.             max = s;
  11.         }
  12.     }
  13.     cout <<"最高分为"<< max;
  14.     return 0;
  15. }

3.100里有几个含7的数

  1. #include <iostream>
  2. using namespace std;
  3. int main(){
  4.     int n;
  5.     for(int i=1;i<=100;i++){
  6.         if(i%10==7||i/10==7){
  7.             cout<<i<<" ";
  8.             n=n+1;
  9.         }
  10.     }
  11.     cout<<endl<<n;
  12.     return 0;
  13. }