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[英]error: ‘class std::vector<Shape*>’ has no member named ‘sort’
[英]‘class shape’ has no member named ‘info’ but adding one doesn't work either
我正在嘗試編譯一些代碼( 這段代碼 )但是當我注釋掉第25行時:
virtual void info()=0;
它不編譯:
shape.cpp: In function ‘int main()’:
shape.cpp:345:11: error: ‘class shape’ has no member named ‘info’
svec[0]->info();
但是保持第25行會給出一個關於純虛函數的很長的錯誤...
shape.cpp:77:15: error: cannot declare parameter ‘squ’ to be of abstract type ‘square’
cube(square squ):
^
shape.cpp:30:7: note: because the following virtual functions are pure within ‘square’:
class square : public shape {
^
shape.cpp:25:16: note: virtual void shape::info()
virtual void info()=0;
^
shape.cpp:167:20: error: cannot declare parameter ‘rec’ to be of abstract type ‘rectangle’
cuboid(rectangle rec, double d):
^
shape.cpp:110:7: note: because the following virtual functions are pure within ‘rectangle’:
class rectangle : public shape {
^
shape.cpp:25:16: note: virtual void shape::info()
virtual void info()=0;
等等...
誰能讓我知道我做錯了什么? 謝謝。
該函數在派生類中聲明為const
,但在基類中不聲明。 這意味着派生類不會覆蓋該函數; 他們只是聲明一個具有相同名稱的不同功能。
在基類中添加const
,或在派生類中刪除它。
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