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作为学习练习的一部分，我编写了一个程序，该程序将 double 作为输入，并输出所有 double 的总和，以及最小值、最大值和平均值。尝试运行该程序时，出现此运行时错误:
Unhandled exception at 0x74b01d4d in Hello World.exe: Microsoft C++ exception: Range_error at memory location 0x00dcf760.
当我使用 Visual Studio 2010 调试选项时，我得到 vector subscript is out of range。
代码是:
#include "C:\Users\Kevin\Documents\Visual Studio 2010\Projects\std_lib_facilities.h"
int main() {
vector<double> v;
double number = 0;
cout << "Enter the distance between two cities along the route.\n";
while (cin >> number) {
double sum = 0;
v.push_back(number);
sort(v.begin(),v.end());
for (size_t i = 0; i < v.size(); ++i)
sum += v[i];
cout << "The total distance from each city is " << sum
<< ". The smallest distance is " << v[0]
<< " and the greatest distance is " << v[v.size()]
<<". The mean distance is " << sum/v.size() <<".\n";
cout << "Enter the distance between two cities along the route.\n";}
}
我不得不更改 for 循环中定义的变量类型，因为我遇到了有符号/无符号不匹配错误。代码在编译时没有给出错误，我很难看到问题所在。