用c++分别用 for 语句、 while 语句、 do - while 语句计算斐波那契()前50个数的和。
时间: 2023-11-28 08:47:09 浏览: 33
以下是用三种不同的循环语句计算斐波那契前50个数的和的代码:
使用for循环语句:
```c++
#include <iostream>
using namespace std;
int main() {
int sum = 0, a = 0, b = 1;
for (int i = 0; i < 50; i++) {
int temp = a + b;
a = b;
b = temp;
sum += a;
}
cout << "The sum of first 50 Fibonacci numbers is: " << sum << endl;
return 0;
}
```
使用while循环语句:
```c++
#include <iostream>
using namespace std;
int main() {
int sum = 0, a = 0, b = 1, i = 0;
while (i < 50) {
int temp = a + b;
a = b;
b = temp;
sum += a;
i++;
}
cout << "The sum of first 50 Fibonacci numbers is: " << sum << endl;
return 0;
}
```
使用do-while循环语句:
```c++
#include <iostream>
using namespace std;
int main() {
int sum = 0, a = 0, b = 1, i = 0;
do {
int temp = a + b;
a = b;
b = temp;
sum += a;
i++;
} while (i < 50);
cout << "The sum of first 50 Fibonacci numbers is: " << sum << endl;
return 0;
}
```