为什么这个程序告诉我传递了无效参数

Why is this program telling me invalid parameter was passed?

本文关键字:无效 参数 告诉我 程序 为什么      更新时间:2023-10-16

老实说,我甚至不知道我现在要做什么。但我不能更进一步,直到我让这个函数工作,它每次都抛出异常,出了什么问题?异常为"CS 330 19S,P1,Calvert,Program 1.exe中0x0F61CAB6(ucrtbased.dll)处未处理的异常:无效参数被传递给一个认为无效参数致命的函数">

#include<iostream>
#include<vector>
#include <fstream>
using namespace std;
struct Kinematic {
vector<vector<float>> position;
float orientation;
vector<vector<float>> velocity;
float rotation;
};
struct StreeringOutput {
vector<vector<float>> linear;
float angular;
};
void update(StreeringOutput steering, float time, Kinematic k) 
{
for (int i = 0; i < 100; i++) 
{
for (int j = 0; j < 100; j++) 
{
k.position[i][j] += k.velocity[i][j] * time + 
0.5*steering.linear[i][j] * time*time;
//the above command is where it throws the exception
k.velocity[i][j] += steering.linear[i][j] * time;
}
}
k.orientation += k.rotation*time + 0.5*steering.angular*time*time;
k.rotation = steering.angular*time;
}

int main()
{
int test;
Kinematic kin;
StreeringOutput steering;
float time = 0.0;
ofstream outfile;
outfile.open("Output.txt");
for (int i = 0; i < 100; i++)
{
update(steering, time, kin);
time += 0.5;
}
cin >> test;
return 0;
}

程序启动时,创建对象:

Kinematic kin;
StreeringOutput steering;

这被称为默认初始化,即所有成员都被初始化为默认值。对于vector,它是空状态。

但是update做了这些事情:

// i and j can be as large as 99
k.position[i][j]
k.velocity[i][j]
steering.linear[i][j]

但是position等是空的!vector无法自动增长以满足您的需求。您正在将索引超出绑定,这是未定义的行为。

您应该正确初始化矢量,以确保实际有100个元素:

Kinematic kin;
kin.position.assign(100, vector<float>(100));
// same for others