Question

Computer science help

why the c++defination has bug?

float *arrayFt;
arrayFt = new float(10); // allocate an array of float
for(int i = 0; i <= 10; i++)
arrayFt[i] = 15.0; // initialize dynamic array
delete arrayFt; // delete the allocated memory

Answer 1

You have allocated only 10 elements for *arrayFt. But inside the for loop you have assigned 0 to 10, i.e/ 11 times assigned. So logically the array elements will be arrayFt[0] to arrayFt[9]. But you have assigned to arrayFt[10] also.

The correct form will be

for(int i = 0; i <10; i++)
arrayFt[i] = 15.0; // initialize dynamic array

PROGRAM EXECUTION

#include<iostream>
using namespace std;
int main()
{
    float *arrayFt;
    arrayFt=new float(10);// allocate an array of float
    for(int i=0;i<10;i++)
    arrayFt[i]=15.0;// initialize dynamic array
    for(int i=0;i<10;i++)
    cout<<endl<<"arrayFt["<<i<<"] = "<<arrayFt[i]; //DISPLAY THE ARRAY ELEMENTS
   
    delete arrayFt;// delete the allocated memory
   
   
}

output

arrayFt [0] arrayFt [11 = 15 arrayFt [21 15 arrayFt [31 arrayFt [4] arrayFt [51 arrayFt [61 arrayFt [71 arrayFt [81 arrayFt [9 1 = 15 = 15 = 15 = 15 = 15 = 15 = 15 = 15 Process exited after 0.0274 seconds with return value 0 Press any key to continue