#include <stdio.h>
#define LEN 255  //Total ASCII Characterset
void main()
{
	int ASCII[LEN];
	char sentence[100];
	int count = 0, j = 0;
	int code;

	//Initialize the ASCII Array with Zero
	for(int i = 0; i&lt;LEN; i++)
	{
		ASCII[i] = 0;
	}

	printf("Enter the sentence: \n");
	for(j = 0; (sentence[j] = getchar())!='\n'; j++)
	{
		//Do Nothing
	}

	sentence[j] = '';
	count = j;

	//Increment the value of the corresponding ASCII Array
	//Index (code) represents the ASCII Character
	for(int idx = 0; idx&lt;count; idx++)
	{
		code = sentence [ idx ];
		ASCII[ code]  = ASCII[ code ]+1;
	}

	printf("The given sentence is: %s \n",sentence);

	//Print the Result
	int TotalChars = 0;
	for(int ch = 0; ch&lt;LEN; ch++)
	{
		if(ASCII[ch] != 0)
		{
			int cnt = ASCII[ch];
			TotalChars = TotalChars + cnt;
			switch(ch)
			{
			case 9:
				printf("Horizontal Tab - %d\n", cnt);
				break;
			case 11:
				printf("Vertical Tab - %d\n", cnt);
				break;
			case 32:
				printf("Space - %d\n", cnt);
				break;
			default:
				printf("%c - %d\n",ch, cnt);
				break;
			}
		}
	}

	printf("Total Characters - %d\n", TotalChars);
}

OUTPUT

Enter the sentence:
1. GOD IS GREAT !!!
The given sentence is: 1. GOD IS GREAT !!!
Space - 4
! - 3
. - 1
1 - 1
A - 1
D - 1
E - 1
G - 2
I - 1
O - 1
R - 1
S - 1
T - 1
Total Characters - 19

2. How to insert space between each character in a sentence. sentence =”GOOD MORNING” newsentence = “G O O D  M O R N I N G”

The main/logic part of the code is just

->1. copy char by char from sentence to newsentence
->2. Insert space after each step 1

#include <stdio.h>

void main()
{
	char sentence[100], newsentence[100];
	int i = 0, j = 0, count = 0;
	printf("Enter the sentence to be formatted:\n");
	for(i = 0; (sentence[i]=getchar())!='\n'; i++)
	{
	}
	sentence[i] = '';
	//shows the number of chars accepted in a sentence
	count = i;
	//Insert Space between each character
	for(i = 0; i<count; i++)
	{
		newsentence[j] = sentence[i];
		j++;
		newsentence[j] = ' ';
		j++;
	}
	newsentence[j] = '';
	printf("The given sentence is: %s \n",sentence);
	printf("Formated sentence is : %s \n",newsentence);
}

OUTPUT

 Enter the sentence to be formated:
 GOOD MORNING
 The given sentence is : GOOD MORNING
 New sentence is  : G O O D   M O R N I N G

3. How to write a code to Outputs its own code

__FILE__ :It is a Predefined Macros : The name of the current source file.
__FILE__ expands to a string surrounded by double quotation marks.

fgetc: Read a character from a stream. returns an integer
putchar: Writes a character to a stream

#include "stdio.h"
#include <stdlib.h>
//Program that outputs its own code
int main ()
{
	FILE *fp;
	char c;

	fp = fopen(__FILE__,"r");
	while((c=getc(fp))!= EOF)
	{
		printf("%c",c);
	}
	fclose(fp);
}

4. Swap of two numbers  with out temp

#include "stdio.h"
#include <stdlib.h>

int main()
{
	int a,b;
	a=10;
	b=20;
	printf("Before swaping\n");
	printf("%d\t%d\n",a,b);

	/* normal temp
	int temp;
	temp=a;
	a=b;
	b=temp;

	//sol:-1
	a=a+b;
	b=a-b;
	a=a-b;

	//sol:-2
	a=a*b;
	b=a/b;
	a=a/b;*/

	//sol:-3
	//a^=b^=a^=b;

	a= a^b;
	b= a^b;
	a= a^b;
	printf("%d\t",a);
	printf("After swaping\n");
	printf("%d\t%d\n",a,b);
	return 0;
}

5. Write a program to print “Hello World” with out using semicolon(;) ?

#include "stdio.h"
#include <stdlib.h>

int main()
{
	if(printf("Hello World "))
	{
		//do nothing
	}
}

6. Write a program to display the output as
*****
****
***
**
*

void main()
{
	for(int i=1; i<=5; i++)
	{
		for(int j=5; j>=i; j--)
		{
			printf("*");
		}

		printf("\n");
	}
}

7. Write a program to display Fibonacci Series Using Recursion

#include <stdio.h>

unsigned int fibonacci (unsigned int n)
{
  if (n <= 2)
  {
      return 1;
  }
  else
  {
      return fibonacci(n-1) + fibonacci(n-2);
  }
}

int main()
{
  unsigned int i, j=0;

  printf("\n Enter the fibonnaci number : ");
  scanf("%d", &i);

  for(j=1; j<=i; j++)
    printf("%d  ",fibonacci(j));
}