我非常困惑为什么我的代码在运行val研内存检查时会出现错误:
valgrind --tool=memcheck --leak-check=yes ./output
在编译和运行时,代码工作得很好。但是,在运行valgrind工具时,它最终会给出这样的信息。
错误摘要:来自9个上下文的170个错误(抑制:2来自2)
如果有人能帮我,那就太好了。
谢谢/Pete
#include <iostream>
#include <cstdlib>
#include <list>
#include <stdexcept>
#include <algorithm>
using namespace std;
template <typename T>
class Vector{
public:
T* p;
size_t size;
public:
Vector<T>(){
cout << "The default constructor" << endl;
this-> size = 10; // initial size
this-> p = new T[size];
}
~Vector<T>(){
cout << "The destructor" << endl;
delete [] p;
}
void print_values(){
for (unsigned i = 0; i < this->size; ++i){
std::cout << *(this->p+i) << " ";}
std::cout << endl;
}
};
int main(){
Vector <double> dvect;
//dvect.print_values(); // why gives error?
}
发布于 2013-10-01 16:17:17
是否在打印矢量元素之前初始化它们?对代码的此更改为我修复了valrgind错误:
--- foo.cpp.orig 2013-10-01 09:15:30.093127716 -0700
+++ foo.cpp 2013-10-01 09:15:34.293127683 -0700
@@ -16,7 +16,7 @@
Vector<T>(){
cout << "The default constructor" << endl;
this-> size = 10; // initial size
- this-> p = new T[size];
+ this-> p = new T[size]();
}
~Vector<T>(){
请注意,只有在取消对您的dvect.print_values()
调用进行注释时,我才得到了计算量错误。
发布于 2013-10-01 16:17:11
这是我的结果
==21382==
==21382== HEAP SUMMARY:
==21382== in use at exit: 0 bytes in 0 blocks
==21382== total heap usage: 1 allocs, 1 frees, 80 bytes allocated
==21382==
==21382== All heap blocks were freed -- no leaks are possible
==21382==
我认为,您获得的错误摘要可能来自不属于代码一部分的标题。
https://stackoverflow.com/questions/19120733
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