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POC++ 2D array of pointers segmentation fault
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2012-10-25T19:09:53.803
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I am facing an issue with a 2D array of pointers. It compiles with no errors, however when I try to run the file, all I get is a single line saying I have a segmentation fault. My header file: <pre><code>#ifndef __TWODARRAY_H__ #define __TWODARRAY_H__ template <typename T> class TwoDArray { private: T** theArray; int numRows; int numCols; T defSpace; public: TwoDArray<T> (int r, int c, T def); ~TwoDArray<T>(); void insert(int r, int c, T value); T access(int r, int c); void remove(int r, int c); void print(); int getNumRows(); int getNumCols(); }; #endif </code></pre> My Methods: <pre><code>#include "TwoDArray.h" #include <iostream> #include <assert.h> #include <string> //initializes the 2D Array template <typename T> TwoDArray<T>::TwoDArray(int r, int c, T def) { assert(r > 0 && c > 0); numRows = r; numCols = c; defSpace = def; theArray = new T*[r]; for(int i=0; i<r; i++) { theArray[i] = new T[c]; } //sets all values to the default for(int i=0; i<r; i++) { for(int j=0; j<c; j++) { theArray[i][j] = defSpace; } } } //deletes the 2D Array template<typename T> TwoDArray<T>::~TwoDArray() { for(int i=0; i<numRows; i++) { delete[] theArray[i]; } delete[] theArray; } //inserts value v at row r and column c template<typename T> void TwoDArray<T>::insert(int r, int c, T value) { assert(r < numRows && c < numCols); assert(value != defSpace); theArray[r][c] = value; } //get value at row r, column c template<typename T> T TwoDArray<T>::access(int r, int c) { assert(r < numRows && c < numCols); T result = theArray[r][c]; return result; } //set value at row r and column c back to default template<typename T> void TwoDArray<T>::remove(int r, int c) { assert(r < numRows && c < numCols); assert(theArray[r][c] != defSpace); theArray[r][c] = defSpace; } //print the 2D Array template<typename T> void TwoDArray<T>::print() { for(int i=0; i<numRows; i++) { for(int j=0;j<numCols; i++) { std::cout << theArray[i][j]; std::cout << " "; } std::cout << std::endl; } } //gets number of rows for test template<typename T> int TwoDArray<T>::getNumRows() { return numRows; } //gets number of columns for test template<typename T> int TwoDArray<T>::getNumCols() { return numCols; } template class TwoDArray<int>; template class TwoDArray<std::string>; </code></pre> And my main: <pre><code>#include <iostream> #include <string> #include "TwoDArray.h" using std::cout; using std::endl; int main() { TwoDArray<int>* i = new TwoDArray<int>(5, 5, 0); TwoDArray<std::string>* s = new TwoDArray<std::string>(5, 5, "o"); i->insert(1, 1, 1); i->insert(1, 3, 1); i->insert(3, 2, 8); i->insert(2, 0, 3); i->insert(2, 4, 3); i->insert(3, 2, 8); i->print(); s->insert(0, 2, "North"); s->insert(4, 2, "South"); s->insert(2, 4, "East"); s->insert(2, 0, "West"); s->print(); return 0; } </code></pre> Any ideas why I'm getting a segmentation fault?
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<c++><pointers><segmentation-fault><multidimensional-array>
Title
C++ 2D array of pointers segmentation fault
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1. COYou get specific line? What environment you are on? Did you try debugging ?
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