1. Crear e imprimir un ¡Hola mundo!:
#include < stdio.h>
int main (void)
{
printf("\nHello World!\n");
return 0;
}
2. Crear una variable entera e imprimir su valor en la pantalla (función printf):
#include < stdio.h>
int main (void)
{
int num = 2;
printf("\nMy favourite number is = %d\n", num);
return 0;
}
3. Crear 3 variables enteras, sumar los valores de las dos primeras, guardar el resultado en la tercera e imprimir su valor en la pantalla:
#include < stdio.h>
int main (void)
{
int A = 10;
int B = 35;
int sol = A + B;
printf("\nThe addition between A and B is = %d\n", sol);
return 0;
}
4. Introducir por teclado el valor de la variable entera (función scanf) e imprimir su valor en la pantalla:
#include < stdio.h>
int main (void)
{
int num;
printf("\nWrite your favourite integer number: ");
scanf("%d", &num);
printf("\n%d is the number that you chose.\n", num);
return 0;
}
5. Introducir por teclado los valores de dos variables enteras e imprimir los resultados de sumarlos, restarlos y multiplicarlos:
#include < stdio.h>
int main (void)
{
int a; //Variable of the first number.
int b; //Variable of the second number.
int add; //Storage variable of the adding.
int sub; //Storage variable of the subtracting.
int mult; //Storage variable of the multiplying.
//Introduce the two numbers.
printf("\nWrite the first integer number: ");
scanf("%d", &a);
printf("Write the second integer number: ");
scanf("%d", &b);
//Doing the operations.
add = a + b;
sub = a - b;
mult = a * b;
//Print the results.
printf("\nThe result of the adding is = %d", add);
printf("\nThe result of the subtracting is = %d", sub);
printf("\nThe result of the multiplying is = %d\n", mult);
return 0;
}
6. Preguntar al usuario para que introduzca por teclado el año actual y el año en que nació, e imprimir la edad que cumplirá este año:
#include < stdio.h>
int main (void)
{
int year; //Variable of the year where we are.
int born; //Variable of the year when I was born.
int age; //Storage variable of the actual age of the user.
//Answer the two questions.
printf("\nWhich is the year where we are? : ");
scanf("%d", &year);
printf("Which year were you born? : ");
scanf("%d", &born);
//Doing the operations.
age = year - born;
//Print the results.
printf("\nIn %d you are: %d years.\n", year, age);
return 0;
}
7. Preguntar al usuario para que introduzca por teclado los años de su madre, su padre y los suyos, e imprimir el total de años vividos por los tres:
#include < stdio.h>
int main (void)
{
int age1; //Variable of the age of his mother.
int age2; //Variable of the age of his father.
int age3; //Variable of his age.
int totalAges; //Storage variable of how much time have lived them.
//Answer the two questions.
printf("\nHow old is your mother? : ");
scanf("%d", &age1);
printf("How old is your father? : ");
scanf("%d", &age2);
printf("How old are you? : ");
scanf("%d", &age3);
//Doing the operations.
totalAges = age1 + age2 + age3;
//Print the results.
printf("\nThe total years lived by the three of them is: %d years.\n", totalAges);
return 0;
}
8. Introducir por teclado dos números (x e y) como variables enteras e imprimir sus valores antes de intercambiarlos. Luego, intercambiar sus valores para que y se convierta en x y x se convierta en y. Por último, imprimir sus valores en la pantalla:
#include < stdio.h>
int main (void)
{
//Variables.
int x; //Variable of the first digit.
int y; //Variable of the second digit.
int aux; //Storage variable used by the Bubble Method, as auxiliar.
//Answer the two questions.
printf("\nWrite the first digit (between 0 to 9): x = ");
scanf("%d", &x);
while((x<0) || (x>9))
{
printf("\tYou have to introduce a number in the first digit between 0 to 9.\n");
printf("Write the first digit (between 0 to 9): x = ");
scanf("%d", &x);
}
printf("Write the second digit (between 0 to 9): y = ");
scanf("%d", &y);
while((y<0) || (y>9))
{
printf("\tYou have to introduce a number in the second digit between 0 to 9.\n");
printf("Write the second digit (between 0 to 9): y = ");
scanf("%d", &y);
}
//The digits and the number before the swap.
printf("\nBefore applied the Bubble Method: x = %d and y = %d", x, y);
printf("\nAnd the number together is xy = %d%d\n", x, y);
//Doing the Bubble Method.
aux = x;
x = y;
y = aux;
//The digits and the number after the swap.
printf("\nAfter applied the Bubble Method: x = %d and y = %d", x, y);
printf("\nAnd the number together is xy = %d%d\n", x, y);
return 0;
}
9. Introducir por teclado dos números complejos representados por sus partes reales e imaginarias (ai+b y ci+d). Calcular e imprimir el resultado de sumar, restar y multiplicar ambos números:
#include < stdio.h>
int main (void)
{
//Variables.
int a; //Variable of the real part of the first complex number.
int b; //Variable of the imaginary part of the first complex number.
int c; //Variable of the real part of the second complex number.
int d; //Variable of the imaginary part of the second complex number.
//Answer the two questions.
printf("\nWrite the real part of the first complex number: a = ");
scanf("%d", &a);
printf("Write the imaginary part of the first complex number: b = ");
scanf("%d", &b);
printf("\nWrite the real part of the second complex number: c = ");
scanf("%d", &c);
printf("Write the imaginary part of the second complex number: d = ");
scanf("%d", &d);
//Printing the first complex number.
printf("\nFirst complex number = %d + i(%d)", a, b);
//Printing the second complex number.
printf("\nSecond complex number = %d + i(%d)", c, d);
//Doing the adding of these complex numbers.
int add_real = a + c;
int add_img = b + d;
//Doing the subtracting of these complex numbers.
int sub_real = a - c;
int sub_img = b - d;
//Doing the multiplying of these complex numbers.
int mult_real = a * c;
int mult_img = b * d;
//The result of the adding.
printf("\nThe final complex number after adding is = %d + i(%d)", add_real, add_img);
//The result of the subtracting.
printf("\nThe final complex number after subtracting is = %d + i(%d)", sub_real, sub_img);
//The result of the multiplying.
printf("\nThe final complex number after multiplying is = %d + i(%d)", mult_real, mult_img);
return 0;
}
10. Introducir por teclado: el precio de hacer una fotografía en una tienda de fotografías y el número de fotografías a realizar. Por último, imprimir el precio total de esas fotografías:
#include < stdio.h>
int main (void)
{
//Variables.
int OnePhoto; //Variable of the price of 1 photo.
int NumPhoto; //Variable of the number of photos that the guest wants.
int Total_Price; //Variable of the price of all photos.
//Dialogue between the cashier of the Photo Studio and the Guest.
printf("\n\n\n Milotovic Photo Studio \n");
printf("\nCashier: Welcome to the best Photo-Store in Novi Sad!");
printf("\nGuest: Hi! Could you tell me the price of making a photograph here?");
printf("\nCashier: Yes, of course. The price (in euros) of making a photograph here is: ");
scanf("%d", &OnePhoto);
printf("Guest: Nice! So, I want to make this amount of photos: ");
scanf("%d", &NumPhoto);
//Doing the operations of the total prices of all photos.
Total_Price = OnePhoto * NumPhoto;
//Continue the dialogue.
printf("Cashier: Perfect! So, The total price of all is: %d euros.", Total_Price);
printf("\nCashier: Do you want to pay by cash or by card?");
printf("\nGuest: Card, please. I never carry money in my wallet.\n");
return 0;
}
11. Calcular la cantidad de comida que se necesita para alimentar a un gato en una semana, si sabemos que el gato come porciones de 80 g dos veces al día. Calcular también el precio de la comida para gatos de un mes (30 días), si 10 g de comida para gatos son 3 dinares (moneda de Serbia):
#include < stdio.h>
int main (void)
{
//Variables.
int moneyOneWeek; //Variable of the price of feeding a cat for 1 week.
int gramesForOneDay; //Variable of the grames that the cat need for feeding for 1 day.
int gramesForOneWeek; //Variable of the grames that the cat need for feeding for 1 week.
int gramesForOneMonth; //Variable of the grames that the cat need for feeding for 1 month.
int oneWeek = 7; //Variable of the days of one week = 7.
int oneMonth = 30; //Variable of the days of one month = 30.
int gramesFood = 10; //Variable of the grames that you can buy in the market with 3 din.
int priceFood = 3; //Variable of the price that 10 g of cat food cost.
int priceForOneWeek; //Variable of the price of the cat food for 1 week = 7 days.
int priceForOneMonth; //Variable of the price of the cat food for 1 month = 30 days.
//Dialogue between the cashier of the Pet Shop and the Guest.
printf("\n\n\n Martin PET SHOP \n");
printf("\nCashier: Welcome to the best Pet Shop in Novi Sad!");
printf("\nGuest: Hi! I need to feed my cat for a week.");
printf("\nGuest: It needs the following grames per day of its own food: "); //The user can write whatever he/she wants, but 160 g is by default.
scanf("%d", &gramesForOneDay);
printf("Guest: Please, can you help me?");
//Doing the operations of how much cost to feed the cat for a week.
gramesForOneWeek = gramesForOneDay * oneWeek;
priceForOneWeek = (gramesForOneWeek * priceFood) / gramesFood;
//Continue the dialogue.
printf("\nCashier: Yes, I can. The price of feeding your cat for a week is: %d din per week.", priceForOneWeek);
printf("\nGuest: Thanks so much! And, which will the price be for a month?");
//Doing the operations of how much cost to feed the cat for a month.
gramesForOneMonth = gramesForOneDay * oneMonth;
priceForOneMonth = (gramesForOneMonth * priceFood) / gramesFood;
//Continue the dialogue.
printf("\nCashier: The price of feeding your cat for a month is: %d din per month.", priceForOneMonth);
printf("\nGuest: Thanks so much for your attention! Nice! Here it is the money. See you!");
printf("\nCashier: See you soon! Thanks for buying in our Pet Shop!");
return 0;
}
Ubicación: Universidad de Novi Sad - Dr Zorana Đinđića 1, Novi Sad 21000, Vojvodina, Serbia
Teléfono: +381 21 485 2056
Correo electrónico: iro.ftn@uns.ac.rs
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