c++ - 编程帮助循环添加

我知道这可能真的很简单，但我不确定自己做错了什么...

分配状态:

对于本实验的第二个程序，您将让用户输入一个介于10到50之间的整数值。您将验证用户是否输入了该范围内的一个值，并继续提示他，直到他确实给您为止该范围内的值。

用户成功输入该范围内的值后，将显示从1到输入值的所有整数之和。

到目前为止，我有:

#include <iostream.h>

 int main () {

int num, sum;

  cout << "do-while Loop Example 2"
       << endl << endl;

  do {
    cout << "Enter a value from 10 to 50: ";
    cin >> num;
    if (num < 10 || num > 50)
      cout << "Out of range; Please try again..."
           << endl;
  } while (num < 10 || num > 50);

    {
  int i;
  int sum = 0;

  for (num = 1; num <= 50; num ++)
  sum = sum + num;
}

  cout << endl << "The sum is " << sum << endl;

return 0;

}

我只是不确定我到底在做错什么...我总是得到错误的总数...

最佳答案

更正的代码是

#include <iostream.h>

 int main () {

int num;

  cout << "do-while Loop Example 2"
       << endl << endl;

  do {
    cout << "Enter a value from 10 to 50: ";
    cin >> num;
    if (num < 10 || num > 50)
      cout << "Out of range; Please try again..."
           << endl;
  } while (num < 10 || num > 50);

                         //<----Removed the extra set of {}
  int i,sum=0;//<---- Changed the declaration here


  for (i= 1; i <= num; i++) //<----Change Here
  sum += i;


  cout << endl << "The sum is " << sum << endl;

return 0;

}

关于c++ - 编程帮助循环添加，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/2534647/