C++初始化双层vector(vector<vector<double>>)出现Expression: vector subscript out of range错误解决方法
报错代码块为:
vector<vector<double>> dist;//distance list
for (i = 0; i < n; i++) {//init distance list
for (j = 0; j < n; j++) {
dist[i].push_back(0.1);
}
}
分析原因后觉得应该是vector<vector<double>> dist
中一个vector<double>
向量都没有,所以在循环中会报越界错误,修改成以下形式就不报错了:
for (i = 0; i < n; i++) {//init distance list
vector<double> v;
dist.push_back(v);
for (j = 0; j < n; j++) {
dist[i].push_back(0.1);
}
}