c++ - calculate sum of integers from a file using structure pointer -

struct data { int *pdata; int nsize; int nsum; int nmax; int nmin; float fmean; };  struct data readdatafile(const char *pfilename);  int main(void) { data stdata = readdatafile ("data.txt"); printf("we read %d numbers\n", stdata.nsum); printf("sum: %d\nmean: %f\nmax: %d\nmin: %d\n", (float)stdata.nsum / stdata.nsize, stdata.nmax, stdata.nmin); return 0; } 

how assign values data.txt *pdata , calculate nsum? have done storing values array. unable assign , complete using pointer?

i did using arrays below.

if (infile.is_open())     {             while (infile.good())             {                     infile.getline(cnum, 256, ' ');                     arrays[count]= atoi(cnum) ;                     ++count ;             }             infile.close();             min = arrays[0];             max = arrays[0];             for(int j=0; j<count; j++)             {                 if(min > arrays[j])                     min = arrays[j];                 if(max < arrays[j])                     max = arrays[j];                 sum = sum + arrays[j];             }             mean = sum/count;             cout<<"sum= "<<sum<<"; min= "<<min<<"; max= "<<max<<"; mean= "<<mean<<"\n";     } 

but how use structure same??

pdata should dynamically allocated array. number of elements of file , allocate memory :

your_struct.pdata = new int[your_struct.nsize]; 

then can fill int values in file , use array calculate sum, max, min , mean.

and don't forget delete[] your_struc.pdata when you're done it.