How to implement summing up with accumulation in a for …

In C++, you can use a for loop to achieve cumulative summation. The specific implementation steps are as follows:

1. Firstly, define a variable to store the cumulative result, such as “sum”, and initialize it to 0.
2. Next, use a for loop to iterate over the range of numbers that need to be accumulated.
3. In the loop, add each iterated number to the sum.
4. After the loop ends, sum will be the accumulated result.

Here is a specific example code:

#include <iostream>

int main() {
    int n;  // 需要累加的数的范围
    int sum = 0;  // 累加的结果

    std::cout << "请输入需要累加的数的范围：";
    std::cin >> n;

    for (int i = 1; i <= n; ++i) {
        sum += i;
    }

    std::cout << "累加的结果为：" << sum << std::endl;

    return 0;
}

In the above code, we determine the range of accumulation by inputting a number n, then use a for loop to iterate from 1 to n, adding each number found during the iteration to the sum. Finally, we output the value of sum as the result of accumulation.

For example, if the input n is 5, the sum of the numbers will be 1+2+3+4+5=15.