c++ - 如何打印出变量的第一个输入/值？ C++

Question

所以我正在编写一个程序，打印出从 1 开始的正整数的连续总和，问题是我想以某种形式计算出最终总和，打印出我在程序开始，但它在所有计算完成后打印出“n”。

#include <iostream>
using namespace std;
int main()
{
int sum,n;
cout << "Enter a number to be added consecutively starting from 1: ";
cin >> n;

do
{
    sum = sum + n;
    n--;
}
while(n > 0);


cout<<"The consecutive sum starting from 1 to "<< n <<"="<< sum <<endl;

return 0;

}

所以我的意思是，在最后一个 cout 中，它将 'n' 打印为 1，因为那时 'n' 停止再次进入 do-while 循环。我想打印出开头输入的'n'作为输入/

提前致谢! (还在学习中)

感谢大家的帮助和回复!看完你们的回复我想改进一下

#include <iostream>
int main()
{
int sum,n;

sum = 0;
std::cout<<"\nEnter a number to be added consecutively starting from 1:";
std::cin>>n;
int t=n;

for (n ; n>0 ; n--)
{
sum = sum + n;

}

std::cout<<"\nThe consecutive sum starting from 1 to "<<t<<" = "<<sum;

return 0;

}

谢谢!

Answer 1

将 n 的值存储到其他变量中并使用该变量来显示该值!或者这样做

 #include <iostream>
using namespace std;
int main()
{
int sum,n;
cout << "Enter a number to be added consecutively starting from 1: ";
cin >> n;
cout<<"The consecutive sum starting from 1 to "<< n ;

do
{
    sum = sum + n;
    n--;
}
while(n > 0);


cout<<"="<< sum <<endl;

return 0;

}

这将给出所需的输出!