“This is day 9 of my participation in the First Wen Challenge 2022.First challenge in 2022″I believe we have played guess numbers this amateur small game, we will use the simplest C language code today to achieve it, the blogger package you learn, remember to like collection.
@TOC
Achieve the goal
- The menu
- First of all, the number guessing game must have a random number
- You can play many games over and over again
- Guess the number to indicate (big, small, right)
The menu
Most games have a menu interface that asks the player to play or quit! We packaged it as a function menu to prompt the player.
void menu(a)
{
printf("**************************\n");
printf("****** 1.paly *******\n");
printf("****** 0.exit *******\n");
printf("**************************\n");
printf("Please select (1/0) >");
}
Copy the codeTectonic framework
How to play the game repeatedly, the first thing we think of is to use the loop while for do while to achieve the purpose of repeating the game
The blogger chose do while
Do while can be used to enter the game once before judging whether it is a game, because we need to put the menu of game selection in the loop, and ask the player to play or exit every time we play the game
Do while implements repeated play, but how to determine play or exit? We can use select statements, if else,switch, because there are only 3 cases 1. Enter the game 2. Exit the game 3. Wrong choice here to choose switch more intuitive we set 1 to enter the game, 0 to exit the game just fit do while 0 to exit the loop code is as follows
int main(a)
{
int input = 0;
do
{
menu(); / / the menu
scanf("%d",&input); // For the player to choose
switch (input) // Enter the branch
{
case 1:game(); / / 1, the game
break;
case 0:printf("Quit the game \n"); / / 0, exit
break;
default:printf("Wrong input, please retype \n"); }}while (input);
return 0;
}
Copy the codeThe game to achieve
Now that we’re in the game, we can guess the numbers
We always set up a random number for players to guess before each game! How do YOU set random numbers in C? C has a function that generates random numbers
rand
int rand (void); <stdlib.h>
Generate random number Returns a pseudo-random integral number in the range between 0 and RAND_MAX (32767)
Rand function details link
The return valueintNo parameter, contained instdlib.hYou can see that in the libraryrandCan generate a0~RAND_MAXRandom number of.
rand100 random numbers were generated. There seems to be no problem.
randfunction
This number is generated by an algorithm that returns a sequence of apparently non-related numbers each time it is called. This algorithm uses a seed to generate the series, which should be initialized to some distinctive value using function srand.
You can see that with rand, you also use the srand function. srand void srand (unsigned int seed);
Initialize the random number generator
Initialize the pseudorandom number generator with the argument passed as seed. For each different seed value used in the call to RAND, the pseudorandom number generator can be expected to produce a different result sequence in subsequent calls to RAND.
Srand details
You can seesrandNo return value, argumentunsigned intCan be used as arandInitialize the random number generator to generate different result sequences.
srandIn order to achieve each random number generation! (O O ױ omega)! Our goal is to generate random numbers.
order to generate random-like numbers, srand is usually initialized to some distinctive runtime value, like the value returned by
function time (declared in header <ctime>).This is distinctive enough for most trivial randomization needs.
A closer look at the srand function reveals another time function
time time_t time (time_t* timer); time.hThe return valuetime_t, the parametertime_t* 
time_tThe type oflong long
Get the current time
Gets the current calendar time with a value of type time_t. The function returns this value, and if the argument is not a null pointer, it sets this value to the object that the timer points to.
The value returned usually represents the number of seconds since 00:00 hours of UTC, January 1, 1970 (the current Unix timestamp)! The time stamp
The timestamp is the difference between the current time and 00:00, January 1, 1970. So we can know that different times have unique time stamps, so our random number can be replaced by time stamps.
srandJust use build once, so we can put,mainIn the function, it is guaranteed to be executed only once.
How do we set the range of random numbers? If we want to generate random numbers from 1 to 100, we use rand%100+1.
int x=rand()%100+1;
Copy the codeThen we will have to guess the number, may guess big, guess small, guess right, to prompt the player. You can do this with an if else structure.
Part of the game code
void game(a)
{
int x=rand()%100+1;
// Each game generates a random number from 1 to 100,
// Do not put in loop parts to cause bugs
while(1)
{
int gass=0;
scanf("%d",&gass); / / guess Numbers
if(x>gass) // The number is greater than the number you guess
{
printf("Guess too small \n");
}
else if(x<gass)
{
printf("Big guess \n");
}
else
{
printf("Congratulations, you guessed right \n");
break; // If you guess correctly, the game ends and exits the loop}}}Copy the codeAll the code
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<time.h>
void menu(a)
{
printf("**************************\n");
printf("****** 1.paly *******\n");
printf("****** 0.exit *******\n");
printf("**************************\n");
printf("Please select (1/0) >");
}
void game(a)
{
int x = rand()%100+1;
// Each game generates a random number from 1 to 100,
// Do not put in loop parts to cause bugs
while (1)
{
int gass = 0;
printf("Please enter the number you want to guess (1-100)>");
scanf("%d", &gass); / / guess Numbers
if (x > gass) // The number is greater than the number you guess
{
printf("Guess too small \n");
}
else if (x < gass)
{
printf("Big guess \n");
}
else
{
printf("Congratulations, you guessed right \n");
break; // If you guess correctly, the game ends and exits the loop}}}int main(a)
{
// Guess the number game
srand((unsigned int)time(NULL)); // Sets the random generator starting point
int input = 0;
do
{
menu();
scanf("%d",&input);
switch (input)
{
case 1:game();
break;
case 0:printf("Quit the game \n");
break;
default:printf("Wrong input, please retype \n"); }}while (input);
return 0;
}
Copy the code
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