我所有的程序都因为 , , 而崩溃delete [] meanings;，delete [] meanings;当delete [] temp_meaning;我删除这 3 行时它工作正常，所以可能我错误地使用了 delete ... 有人可以在这里启发我吗？
#include <iostream>
#include <string>
#include <cstring>
using namespace std;
class Expression {
char *word_with_several_meanings; // like "bank", "class"
char **meanings; // a pointer to a pointer stores all meanings
int meanings_ctr; // meanings counter
//-----------FUNCTIONS------------------------------------------------
public:
void word(const char* = NULL );
void add_meaning(char * = NULL);
char* get_word();
int get_total_number_of_meanings();
char* get_meaning(int meanx = 0);
Expression(int mctr = 0); // CTOR
~Expression(); // DTOR
};
Expression::Expression(int mctr ) {
meanings_ctr = mctr; // Setting the counter to 0
meanings = new char * [meanings_ctr]; // Allocate Space for meanings
}
Expression::~Expression() {
while(meanings_ctr-->0){
delete meanings[meanings_ctr];
}
delete [] meanings; // Deleting the memory we allocated
delete [] word_with_several_meanings; // Deleting the memory we allocated
}
void Expression::word(const char *p2c )
{
word_with_several_meanings = new char[strlen(p2c)+1];
// copy the string, DEEP copy
strcpy(word_with_several_meanings, p2c);
}
void Expression::add_meaning( char * p2c)
{
//meanings[ meanings_ctr ] = new char [strlen(p2c) + 1];
//strcpy(meanings[ meanings_ctr++ ] , p2c);
// temp
if (meanings_ctr < 1){
meanings[ meanings_ctr ] = new char [strlen(p2c) + 1];
strcpy(meanings[ meanings_ctr++ ] , p2c);
}
else {
int temp_ctr;
char **temp_meaning;
temp_meaning = new char * [meanings_ctr-1];
for(temp_ctr =0; temp_ctr<meanings_ctr;temp_ctr++){
temp_meaning[temp_ctr] = new char [strlen(meanings[ temp_ctr ]) + 1];
strcpy(temp_meaning[temp_ctr], meanings[ temp_ctr ]);
}
for (temp_ctr =0; temp_ctr<meanings_ctr;temp_ctr++){
delete meanings[temp_ctr];
}
delete [] meanings;
meanings = new char * [meanings_ctr];
for(temp_ctr =0; temp_ctr<meanings_ctr;temp_ctr++){
meanings[ temp_ctr ] = new char [strlen(temp_meaning[temp_ctr]) + 1];
strcpy(meanings[ temp_ctr ], temp_meaning[temp_ctr]);
}
meanings[ meanings_ctr ] = new char [strlen(p2c) + 1];
strcpy(meanings[ meanings_ctr ] , p2c);
for (temp_ctr =0; temp_ctr<meanings_ctr;temp_ctr++){
delete temp_meaning[temp_ctr];
}
delete [] temp_meaning;
meanings_ctr++;
}
}
char * Expression::get_meaning( int meanx )
{
return *(meanings+meanx);
}
char * Expression::get_word()
{
return word_with_several_meanings;
}
int Expression::get_total_number_of_meanings()
{
return meanings_ctr;
}
int main(void) {
int i;
Expression expr;
expr.word("bank");
expr.add_meaning("a place to get money from");
expr.add_meaning("b place to sit");
expr.add_meaning("4 letter word");
expr.add_meaning("Test meaning");
cout << expr.get_word() << endl;
for(int i = 0; i<expr.get_total_number_of_meanings(); i++)
cout << " " << expr.get_meaning(i) << endl;
Expression expr2;
expr2.word("class");
expr2.add_meaning("a school class");
expr2.add_meaning("a classification for a hotel");
expr2.add_meaning("Starts with C");
cout << expr2.get_word() << endl;
for( i = 0; i<expr2.get_total_number_of_meanings(); i++)
cout << " " << expr2.get_meaning(i) << endl;
Expression expr3;
expr3.word("A very long test");
char str[] = "Meaning_ ";
for(int kx =0; kx<31; kx++){
str[8] = ('A'+kx);
expr3.add_meaning(str);
}
cout << expr3.get_word() << endl;
for( int i = 0; i<expr3.get_total_number_of_meanings(); i++)
cout << " " << expr3.get_meaning(i) << endl;
return 0;
}