Special C Programs

Dear learners,

Following is the list of special C programs. These are programs where some special function or logic is used.

• Use of XOR operations on two numbers using C program.

• C program to ring a bell.

• C program to ring a bell using ASCII value 7.
• Use of Time (Sleep) function in C program.

• C program to separate words (tokens) from a given string.

• C program to count spaces in a given string.
• Program of System Date and Time

• C program to print ASCII values and its corresponding character.

• C program to print memory addresses of an array elements.

• Changing(swapping) value of two variables without use of third variable.

• Use of MODULUS (%) operator to find odd or even number.

• Use of GOTO statement in C program.

• C program to validate user input.

• C program to print memory occupied by int, float and char variables.

• Program to check Palindrome number.

• Storing New Line character (\n) as a user input data.

• C program to use Arrow keys.

• User input validation to check a number.

• C program to swap values of two variables using third variable.

• C program to find factorial of a given number.

• C program to delete a given file.
• Program to perform mathematical operations on characters.
• Printing Box using ASCII values.

• Printing formatted output using ASCII value.
• C program to calculate the power of an integer without use of inbuilt math function.
• Calculate power of an integer using inbuilt pow function.
• Armstrong number
• Bitcoin Trading - Profit Loss Calculation

Program related to Security

• C Program to encrypt password using Caesar cipher. (Sender side)

• Program for password decryption using Caesar cipher. (Receiver side)

• Simple Hash function implementation on 8 bits using XOR operation.
• C program to implement sender side confidentiality.

• C program to implement receiver side confidentiality.

Observe the following interesting C program.

Printing formatted output using ASCII value. #include<stdio.h> int main() {   int i;   for(i=0; i<10; i++)             printf("%c",174);   printf(" HELLO STUDENTS ");   for(i=0; i<10; i++)             printf("%c",175);               printf("\n\n");               for(i=0; i<10; i++)             printf("%c",176);   printf(" HELLO STUDENTS ");   for(i=0; i<10; i++)             printf("%c",176);               printf("\n\n");               for(i=0; i<10; i++)             printf("%c",257);   printf(" HELLO STUDENTS ");   for(i=0; i<10; i++)             printf("%c",258);   return 0;           } Output of the Program:

C program to print memory occupied by int, float and char variables. #include<stdio.h> int main() {   int i;   float f;   char ch;   printf("Size of int variable: %d \n",sizeof(i));   printf("Size of float variable: %d \n",sizeof(f));   printf("Size of char variable: %d \n",sizeof(ch));   return 0; } Output of the Program: Size of int variable: 4 Size of float variable: 4 Size of char variable: 1 Note: Output of the program may be different on your computer...

C program to use Arrow keys. #include<stdio.h> int   main()  {   int chr1, chr2;   printf("Press any arrow key...\n");   chr1 = getch();   if (chr1 == 0xE0) //to check scroll key interrupt  {    chr2 = getch();  //to read arrow key   switch(chr2)    {     case 72: printf("UP ARROW KEY PRESSED\n");              break;     case 80: printf("DOWN ARROW KEY PRESSED\n");              break;     case 75: printf("LEFT ARROW KEY PRESSED\n");              break;     case 77: printf("RIGHT ARROW KEY PRESSED\n");              break;    default: printf("OTHER KEY PRESSED: %d %d\n", chr1, chr2);                break;    };   }   return 0; } Output of the Program: Press any arrow key... UP ARROW KEY PRESSED