c practicle codes

// first_c.cpp : Defines the entry point for the console application.
//

#
include "stdio.h"

int main() {

  star_6();

  return 0;
}

cube() {

  int marks;

  printf("please enter your mark here!\n");
  scanf_s("%d", & marks);

  if (marks > 40) {

    printf("your mark is good!");

  } else {

    printf("your mark is not good!");

  }

}

square() {

  float num;

  printf("please enter your number here!\n");
  scanf_s("%f", & num);

  float square = num * num;
  float cube = num * num * num;

  printf("square of the number is : %f\n", square);
  printf("cube of the number is : %f\n", cube);

}

celsius() {

  float fahrenheit;

  printf("please enter fahrenheit here!\n");
  scanf_s("%f", & fahrenheit);

  float C = 5 / 9.0 * (fahrenheit - 32);

  printf("celsius of the fahrenheit is : %f\n", C);

}

area() {

  float length;

  printf("please enter the length of the sqaure : \n");
  scanf_s("%f", & length);

  float area = length * length;

  printf("area of the square is : %f\n", area);

}

tax() {

  float amount;
  float tax_rate;

  printf("please enter the amount of the good here : \n");
  scanf_s("%f", & amount);
  printf("please enter the tax rate of the good here : \n");
  scanf_s("%f", & tax_rate);

  float sales_tax = amount * tax_rate / 100;

  printf("sales tax of the good is : %f\n", sales_tax);

  float total_amount = amount + sales_tax;

  printf("total amount of the good id : %f\n", total_amount);

}

price() {

  float price_of_item;
  float amount_of_cash;

  printf("please enter price of the item here!\n");
  scanf_s("%f", & price_of_item);
  printf("please enter the amount of the cash , the customer gave you here\n");
  scanf_s("%f", & amount_of_cash);

  float amount_of_change = amount_of_cash - price_of_item;

  printf("amount of change that given to customer is : %f\n", amount_of_change);

}

star_1() {

  for (int i = 0; i < 4; i++) {

    //printf("\n");

    for (int j = 0; j < 5; j++) {

      printf("*");

    }

    printf("\n");

  }

}

star_2() {

  for (int i = 1; i < 5; i++) {

    for (int j = 0; j < i; j++) {

      printf("*");

    }

    printf("\n");

  }

}

star_3() {

  for (int i = 1; i < 5; i++) {

    for (int j = 0; j < i; j++) {

      printf("%d", i);

    }

    printf("\n");

  }

}

star_4() {

  for (int i = 1; i < 5; i++) {

    int a = 65;

    for (int j = 0; j < i; j++) {

      printf("%c", a + j);

    }

    printf("\n");
  }

}

star_5() {

  for (int i = 5; i > 0; i--) {

    for (int j = 0; j < i; j++) {

      printf("*");

    }

    printf("\n");

  }

}

star_6() {

  for (int i = 1; i < 5; i++) {

    int a = 1;

    for (int j = 0; j < i; j++) {

      printf("%d", a + j);

    }

    printf("\n");
  }

}