How to code in professional manner? [closed]

Answer 1

Here are few changes style wise, so may differ from person to person but be consistent.

• Add a comment at top of the file
• Add space after comma e.g. swap(int *,int *); -> swap(int *, int *);
• Add space after semicolon in for loop
• Add space after and before operators e.g '=', '+' , '-'
• Remove unecessary space after braces and main
• Be explicit so add braces {} in each for loop
• Group code lines in group and separate groups by newlines
• Start while loop brace from same column

Here is modified code

#include
#include

/******************************************** 
Write a comment about what this program does.
General overview
*********************************************/

void insert(int i); 
void swap(int *, int *); 
void heap_sort(int);

int a[20];

void main() 
{
        int n, i;
        clrscr();

        printf("Enter the no of elements : ");
        scanf("%d", &n);

        printf("\nEnter the elements : \n");
        for(i=0; i0) && (item>a[j]))
        {
                a[i] = a[j];
                i = j;
                j = (i - 1) / 2;
        }
       a[i] = item; 
}