Some C compiler will give you a warning when your main function does not return an integer.

In this case, do the following changes to the main function:

int main()
{
......
......
return...

Seeing you have made some efforts in coding it yourself, I will take the trouble to go through your long post.

Here are the problems:

1. Initialize all your marks and counters when you declare...

First parameter is wrong. Use char* instead of char. Are you going to change the value of those variables inside the function? If so, pass pointers or reference, else you can simply pass by values.

What language you use? What's your level of proficiency? And how much time you have?

When you are using the printf function:

printf("%s", a);


The function is treating variable "a" as a pointer to the beginning of a stream of characters. However, it doesn't have the...