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如何複製結構的載體導入結構的另一個載體如:C++如何結構的載體複製到結構的另一向量,其具有一種重複
讓第一和第二矢量爲:
std::vector <myStruct> OriginalVector
std::vector <myStruct> NewVector
其中:
struct Linkedvalues{
int indx;
double Val;
};
struct myStruct{
std::vector<int> Id;
double avg;
std::vector<Linkedvalues> lValues;
double sum= 0.0;
};
在我的計劃,我充滿OriginalVector
,我需要在NewVector
與這種重複複製其值:
讓OriginalVector
具有以下值:
{ (1, 2), 0.6, {(1, 0.5), (3,0.1), (5,0.7)}, 1.5 }
{ (1, 3), 0.5, {(1, 0.2), (4,0.9), (5,0.7)}, 3.1 }
{ (2, 3), 0.1, {(3, 0.4), (2,0.2), (5,0.7)}, 4.2 }
{ (3, 5), 0.3, {(2, 0.1), (3,0.6), (5,0.7)}, 7.5 }
我想創建NewVector
爲:
{ (1, 2), 0.6, {(1, 0.5), (3,0.1), (5,0.7)}, 1.5 }
{ (2, 1), 0.6, {(1, 0.5), (3,0.1), (5,0.7)}, 1.5 } // also add the same previous
//vector but swap (1,2) to (2,1)
{ (1, 3), 0.5, {(1, 0.2), (4,0.9), (5,0.7)}, 3.1 }
{ (3, 1), 0.5, {(1, 0.2), (4,0.9), (5,0.7)}, 3.1 } // also add the same previous
//vector but swap (1,3) to (3,1)
{ (2, 3), 0.1, {(3, 0.4), (2,0.2), (5,0.7)}, 4.2 }
{ (3, 2), 0.1, {(3, 0.4), (2,0.2), (5,0.7)}, 4.2 } //also add the same previous
//vector but swap (2,3) to (3,2)
{ (3, 5), 0.3, {(2, 0.1), (3,0.6), (5,0.7)}, 7.5 }
{ (5, 3), 0.3, {(2, 0.1), (3,0.6), (5,0.7)}, 7.5 } //also add the same previous
//vector but swap (3,5) to (5,3)
爲了做到這一點,我做了以下內容:
int i=0;
while (i < OriginalVector.size())
{
auto it = (std::make_pair(OriginalVector[i].id.front(), OriginalVector[i].id.back()));
auto itt = (std::make_pair(OriginalVector[i].id.back(), OriginalVector[i].id.front()));
// Here I fail to insert it and itt with the rest of OriginalVector[i] members into NewVector
++i;
}
那麼,有沒有對''在這些結構在所有。我錯過了什麼嗎? –
2014-09-29 21:05:02
但大小2的'矢量'不是一對。這不僅僅是類型系統的工作方式。您可能正在尋找像'vector(OriginalVector [i] .id.front(),OriginalVector [i] .id.back())' –
2014-09-29 21:11:56
如果第一個vector真的總是存儲兩個元素,那麼您應該認真考慮將它作爲一個'std :: pair','std :: tuple'或'std :: array'。效率更高。 – Deduplicator 2014-09-29 21:19:11