Please help with this RunTime Error

[itxharsh]

/*When i run the program i get a run time error Your code has stopped its execution with a non-zero (failure) exit value.This is generally due to run time Exceptions like Memory Access Violation and Floating Point Exception. Please check your code for run time Exceptions and try again.*/
 
/* Header File "nonpreemptive.h"
 
class NonPreemptive
{
 public:
     int* getWaitingTime(int* process, int* arrivalTime, int* burstTime, int nProcess);
};  */
 
#include<iostream>
#include"nonpreemptive.h"
using namespace std;
NonPreemptive s1;
int* NonPreemptive::getWaitingTime(int* process, int* arrivalTime, int* burstTime, int nProcess)
{
if(arrivalTime[0]!=0)
{
return NULL;
}
int g=0,h=0;
for(g=0;g<nProcess;++g)
{
for(h=g+1;h<nProcess;++h)
{
if(arrivalTime[g]==arrivalTime[h])
{
return NULL;
}
if(arrivalTime[g]>arrivalTime[h])
{
return NULL;
}
if(burstTime[g]<0||burstTime[g]>10)
{
return NULL;
}
}
}
int done=0,min=0,CPU=0,x=0,i=0;
int* result;
while(done<nProcess)
{
min=20000;
for(i=0;i<nProcess;++i)
{
if(process[i]>0)
{
if(arrivalTime[i]<=CPU)
{
if(arrivalTime[i]+burstTime[i]<min)
{
min=arrivalTime[i]+burstTime[i];
x=i;
}
}
}
}
result[x]=CPU-arrivalTime[x];
CPU+=burstTime[x];
++done;
process[x]=-1;
}
return result;
}
int main()
{
    {    int* output;    
        int nProcess = 7;
        int* process = (int*)malloc(sizeof(int) * nProcess);
        int* arrivalTime = (int*)malloc(sizeof(int) * nProcess);
        int* burstTime = (int*)malloc(sizeof(int) * nProcess);
 
        int proc[] = {1,2,3,4,5,6,7};
        int aTime[] = {0,2,4,6,8,10,12};
        int bTime[] = {6,2,5,4,1,3,5};
 
        for(int i=0;i<nProcess;i++)
{
            process[i] = proc[i];
            arrivalTime[i] = aTime[i];
            burstTime[i] = bTime[i];
        }
 
        output = s1.getWaitingTime(process, arrivalTime, burstTime, nProcess);
        printf("\n");
        if(output != NULL)
            for(int i=0;i<nProcess;i++)
                printf ("%d, ",output[i]);
        else printf("NULL");
    }
return(0);
}