[英]Assistance with a Memory Allocation Error in c++, linux using g++
我搜索了其他有類似問題的人,但他們的代碼都與我不同。
當我使用g ++編譯以下代碼時,出現錯誤消息:
basketbOOP:malloc.c:2451:sYSMALLOc:斷言`(old_top ==((((mbinptr)((((char *)&((av)-> bins [(((1)-1)* 2]))))-__builtin_offsetof (struct malloc_chunk,fd))))&& old_size == 0)|| (((unsigned long)(old_size)> =(unsigned long)((((((__ builtin_offsetof(struct malloc_chunk,fd_nextsize))+((2 *(sizeof(size_t)))-1))&〜((2 *(sizeof (size_t)))-1)))&&(((old_top)-> size&0x1)&&((unsigned long)old_end&pagemask)== 0)'失敗。 中止(核心已棄用)
我從來沒有使用過free()或類似的函數,所以我不認為這是問題所在。
通過valgrind運行代碼時,出現“大小為4的無效寫入”。 然后有些混亂,我認為我不完全了解Player構造函數。
對於那些想知道這是我正在編寫的用於幫助學習和理解OOP的作業的籃球模擬程序,所以顯然我不是要您為我編寫代碼,這只是我從未遇到過的錯誤並且需要對其進行修復,以繼續進行分配。
ps:很抱歉缺少注釋,我還沒有解決:/ pps:由於我必須縮進代碼才能使它們全部顯示為代碼,因此格式可能看起來很奇怪
感謝任何事先提供幫助的人!
#include <iostream>
#include <time.h>
#include <string>
#include "/home/craig/Programming/GeneralFunction (1).h"
using namespace std;
class player {
private:
int percent[3];
string name;
int shots[3];
int made[3];
bool MVP;
public:
player(int i){
for (int n = 0; n < 3; n++){
shots[i] = 0;
made[i] = 0;
}
MVP = false;
cout << "What is player #" << i << "'s name? ";
if (i != 1){
cin.clear();
cin.ignore();
}
getline(cin, name);
for (int n = 0; n < 3; n++){
cout << "What is " << name << "'s " << n+1 << "pt Shot Percentage? ";
cin >> percent[n];
if (percent[n] < 0){
cout << "Because you entered a Percent lower than 0%, the percent has been set to 0%. \n";
percent[n] = 0;
}
if (percent[n] > 100){
cout << "Because you entered a Percent greater than 100%, the percent has been set to 100%. \n";
percent[n] = 100;
}
}//for
}//player constructor
~player(){
cout << "Deleting " << name << endl;
}
void RandomPlay(int point){
switch(point){
case 0:
switch(rand()%2){
case 0:
cout << name << " is fouled. " << name << " takes the foul shot and... ";
break;
case 1:
cout << name << " takes a free throw and...";
break;
}//switch 2
break;//1 point
case 1:
switch(rand()%4){
case 0:
cout << name << " goes Up for a lay-up and...";
break;
case 1:
cout << name << " jumps for a SlamDunk and...";
break;
case 2:
cout << name << " shoots a jump shot and...";
break;
case 3:
cout << name << " attempts a field goal from inside the three point line and...";
break;
}//switch 4
break;//2 point
case 2:
switch(rand()%2){
case 0:
cout << name << " shoots a three pointer and...";
break;
case 1:
cout << name << " attempts a field goal from outside the three point line and...";
break;
}
break;//three point
}//switch point
}//RandomPlay
int TakeShot(){
int point = rand()%3;
RandomPlay(point);
shots[point]++;
if (rand()%100+1 <= percent[point]){
made[point]++;
return (point+1);
}
return 0;
}
void DispPlayerStats(){
cout << "PLayer: " << name << endl;
for (int i = 0; i < 3; i++){
cout << i+1 <<" point shot Percent: " << percent[i] << "%" << endl;
cout << i+1 << "pt Shots Taken: " << shots[i] << endl;
cout << i+1 <<"pt Shot Baskets Made: " << made[i] << endl;
}
if (MVP)
cout << name << " was the Most Valuable Player on the Team!" << endl;
}
};
class team {
private:
player *ptrPlayer[5];
string teamName;
static int score;
public:
team(int i){
cout << "What is this teams name? ";
if (i != 1){
cin.clear();
cin.ignore(10000, '\n');
}
getline(cin, teamName);
cout << "Enter Player info for Team " << teamName << ":" << endl;
for (int i = 0; i < 5; i++){
ptrPlayer[i] = new player(i+1);
}
}
string GetName(){
return teamName;
}
int Play(int score){
int oldScore = score;
score += ptrPlayer[rand()%5]->TakeShot();
if (oldScore == score)
cout << " misses!" << endl;
else
cout << " makes it! " << score - oldScore << " more points for Team " << teamName << "!" << endl;
return score;
}
};
int main(){
int score[2] = {0, 0};
SeedRand();
char PbP;
char enter = 1;
team *ptrTeam[2];
for (int i = 0; i < 2; i++){
cout << "ENTER INFO FOR TEAM " << i+1 << ":" << endl;
ptrTeam[i] = new team(i+1);
}
//CLS;
cout << "Would you like a Play by Play? [y/n] ";
cin >> PbP;
while (PbP != 'y' && PbP != 'Y' && PbP != 'N' && PbP != 'n'){
cout << "Invalid Choice: Would you like a Play by Play? [y/n] ";
cin >> PbP;
}
cout << "TIME TO PLAY BASKET BALL! " << endl;
cout << "The " << ptrTeam[0]->GetName() << " versus The " << ptrTeam[1]->GetName() << "!" << endl;
for (int quarter = 1; quarter < 5; quarter++){
//CLS;
cout << score[0] << " - " << score[1] << endl;
for (int pos = 0; pos < 30; pos++){
score[pos%2] = ptrTeam[pos%2]->Play(score[pos%2]);
if (PbP == 'y' || PbP == 'Y')
do {
cout << "Press x to continue." << endl;
cin >> enter;
}while(enter != 'x' || enter != 'X');
}
}//for quarter
return 0;
}
再看一下這個:
for (int n = 0; n < 3; n++){
shots[i] = 0;
made[i] = 0;
}
我不太精通C ++,所以我無法完全為您提供幫助,但是以前我幾乎看到了確切的錯誤消息。 它來自於覆蓋我分配的塊之外的內存,最有可能是malloc
內部使用的數據。 這是“數組索引超出范圍”錯誤。
由於沒有/home/craig/Programming/GeneralFunction (1).h
我無法編譯您的代碼,因此看不到valgrind消息。 如果您發布了valgrind的輸出或足夠的代碼來進行編譯,將很有幫助。
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