FYIMP-Projects

1. Function with argument, without return value:

  #include <stdio.h>
  
  // Function declaration
  void printMessage(char *message);
  
  int main() {
      char msg[] = "Hello, World!";
      printMessage(msg); // Function call
      return 0;
  }
  
  // Function definition
  void printMessage(char *message) {
      printf("%s\n", message);
  } 

2. Function with argument, with return value:

``` #include

// Function declaration int add(int a, int b);

int main() { int result = add(5, 3); // Function call printf(“Sum: %d\n”, result); return 0; }

// Function definition int add(int a, int b) { return a + b; }

# 3. Function without argument, without return value:

#include

// Function declaration void greet();

int main() { greet(); // Function call return 0; }

// Function definition void greet() { printf(“Hello, World!\n”); }

# 4. Function without argument, with return value:

#include

// Function declaration int getNumber();

int main() { int number = getNumber(); // Function call printf(“Number: %d\n”, number); return 0; }

// Function definition int getNumber() { return 42; }

# 5. Call by Value : 

#include

// Function declaration void addTen(int x);

int main() { int a = 5; printf(“Before function call: a = %d\n”, a); addTen(a); // Function call by value printf(“After function call: a = %d\n”, a);

return 0; }

// Function definition void addTen(int x) { x = x + 10; printf(“Inside function: x = %d\n”, x); }

# 6. Call by Reference : 

#include

// Function declaration void addTen(int *x);

int main() { int a = 5; printf(“Before function call: a = %d\n”, a); addTen(&a); // Function call by reference printf(“After function call: a = %d\n”, a);

return 0; }

// Function definition void addTen(int *x) { *x = *x + 10; printf(“Inside function: x = %d\n”, *x); } ```