write a program to access nameless argument in c - variable argument list function

C Program: Accessing Nameless Arguments in Variable Argument List Function

To access nameless arguments in C, we can use the va_list type and the va_start(), va_arg(), and va_end() macros.

The va_list type is a special type that is used to store the information about the nameless arguments. The va_start() macro is used to initialize a va_list variable and to start iterating over the nameless arguments. The va_arg() macro is used to get the next nameless argument. The va_end() macro is used to clean up the va_list variable.

Example of a program to access nameless arguments in C:

#include 
#include 

void print_args(int num_args, ...) {
  va_list args;
  va_start(args, num_args);

  for (int i = 0; i < num_args; i++) {
    int arg = va_arg(args, int);
    printf("%d ", arg);
  }

  va_end(args);
  printf("\n");
}

int main() {
  print_args(3, 1, 2, 3);
  print_args(5, 4, 5, 6, 7, 8);

  return 0;
}

Output:

1 2 3
4 5 6 7 8

The print_args() function takes two arguments: the number of nameless arguments and the nameless arguments themselves. The function first initializes a va_list variable using the va_start() macro. Then, it iterates over the nameless arguments using the va_arg() macro and prints each argument to the console. Finally, the function cleans up the va_list variable using the va_end() macro.

In the main function, we call the print_args() function twice, once with three nameless arguments and once with five nameless arguments. The output of the program is as shown above.

Further Reading:

Variable argument list function in c

write a program for sprint function using variable argument list function in c

write a program to access nameless argument in c - variable argument list function

assignment of variable argument list function in c

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