c++基本语法练习

好的，下面是一些 C++ 基本语法练习：

1. 输出 "Hello, World!"：

#include <iostream>
using namespace std;

int main() {
   cout << "Hello, World!";
   return 0;
}

2. 输入两个数并输出其和：

#include <iostream>
using namespace std;

int main() {
   int a, b, sum;
   cout << "Enter two numbers: ";
   cin >> a >> b;
   sum = a + b;
   cout << "Sum is: " << sum;
   return 0;
}

3. 判断一个数是否为偶数：

#include <iostream>
using namespace std;

int main() {
   int num;
   cout << "Enter a number: ";
   cin >> num;
   if(num % 2 == 0) {
      cout << num << " is even.";
   }
   else {
      cout << num << " is odd.";
   }
   return 0;
}

4. 计算并输出 1 到 100 的和：

#include <iostream>
using namespace std;

int main() {
   int sum = 0;
   for(int i = 1; i <= 100; i++) {
      sum += i;
   }
   cout << "Sum is: " << sum;
   return 0;
}

5. 输出斐波那契数列前 n 个数：

#include <iostream>
using namespace std;

int main() {
   int n, a = 0, b = 1, c;
   cout << "Enter the number of terms: ";
   cin >> n;
   cout << a << " " << b << " ";
   for(int i = 3; i <= n; i++) {
      c = a + b;
      cout << c << " ";
      a = b;
      b = c;
   }
   return 0;
}

希望这些练习对你有所帮助！