分段错误（核心转储）-Xubuntu

Question

I know this is asked a lot, but I couldn't find an answer that fit my situation. I had no pointers in my code and yet I ran into this problem. My program is meant to factor a number, although I haven't been able to test run the program. I am using Ubuntu 16.04 with xfce, So actually xubuntu. main.cpp

#include <iostream>

using namespace std;

int main(){

int wholeNum;
int newNum;
int divider = 2;
int b;
int holderNum;
int remainNum;
bool stopper[wholeNum];



cin >> wholeNum;

while (wholeNum != divider){

    holderNum = wholeNum / divider;
    remainNum = wholeNum % divider;

    if (remainNum == 0){

        if (stopper[divider] != true || stopper[holderNum] != true){
            cout << divider << " * " << holderNum << endl;
        }   
        stopper[divider] = true;
        stopper[holderNum] = true;      
    }

divider ++;
}

return 0;
}

I don't know what is happening, as I'm not using pointers and it compiled perfectly. Any help would be very appreciated!

Answer 1

When you declare the array:

bool stopper[wholeNum];

wholeNum is still undefined. So array stopper[] is of undefined size. You need to first input the value of wholeNum (using cin ) and then declare the stopper[] array. So basically, something like this:

int wholeNum;
//Other lines of your code

cin>>wholeNum;
bool stopper[wholeNum]; //---> Here value of wholeNum is defined.

Here is the successfully complied program.

Hope this helps!