C / C++ / MFC

1. Initialize totalLuminosity to 0.0
2. Create an array of numToProcess (400) elements - lumArray
 3. Get pixel value
 4. Convert colour(RGB) to HSL (Hus Saturation Luminosity)
 5. Add the Luminosity value to totalLuminosity
 6. Set lumArray[curPixelNum] to Luminosity
 7. If #pixels processed < numToProcess(400) goto #3
8. Divide totalLuminosity by numToProcess(400) - this is your avgLuminosity
9. Create a second array with numToProcess (400) elements - diffArray
10. For each element in array from step 2, set difArray[i] = avgLuminosity - lumArray[i]

strcpy("dilip",s.name);
s.phone=123456789;

if(fwrite(&s,sizeof(struct student),1,fp)!=1)

dilipkumarc wrote:

      strcpy("dilip",s.name);

FILE *fp=fopen("student.txt","wb+");

strcpy(s.name, "dilip");

const int NAME_LEN = 20;

struct student                        
{
   char name[NAME_LEN];
   long int phone;
                   
};

char myLongName [] = "this_is_a_very_long_name_largerthan_20_chars";

strncpy(s.name, myLongName, NAME_LEN);
s.name[NAME_LEN - 1] = '\0';

• Read the file content into memory.
• modify it
• Write the modified content to another file (say "output").
• delete the original file and rename the "output" file you produced with the original filename.