猜随机数冷热游戏输出

Question

尝试用代码块c语言编写一个程序:

1. 生成一个从1到100的随机密码，并要求用户猜测该数字
2. 如果用户猜测正确，则打印猜测是正确的
3. 对于第一个猜测，如果它不正确，应该说热
4. 如果用户的猜测越来越接近秘密，则告诉用户他正在变热
5. 如果他的猜测离得更远的话，也可能是冷的
6. 游戏继续，直到猜到密码

我当前的程序在猜测是热还是冷方面给出了错误的输出，也不确定我应该将放在哪里（vs{如果有的话，或者在哪里使用 “else if”。如果不是太多，请解释变化。

#include <stdio.h>
#include <stdlib.h>
#define MAX_VAL 100

 int main(void)
{
  int next_guess, first_guess, secret, distance;
  srand(time(0));

  secret = 1 + rand()%MAX_VAL;
  distance = (secret - first_guess);

while (first_guess != secret) {
printf(" enter your guess from (1 to %d)?\n", MAX_VAL);
scanf("%d", &first_guess);

{

if (first_guess == secret)
    printf("You guessed correctly!\n");

if (first_guess != secret)
    printf("Your guess was hot enter your next guess from (1 to %d)?\n", MAX_VAL);
    scanf("%d", &next_guess);

if (next_guess == secret)
    printf("You guessed correctly!\n");

if ((next_guess-secret) < distance)
    printf("Your guess was hot,");

if ((next_guess-secret) >= distance)
     printf("Your guess was cold,");

   }
  }
  return 0;
}

Answer 1

我不知道为什么这个游戏需要两次猜测。这是我的版本:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define MAX_VAL 100

int main(void)
{
    int guess, secret, distance;
    srand(time(0));

    secret = 1 + rand()%MAX_VAL;

    while (true) 
    {
        printf(" enter your guess from (1 to %d)?\n", MAX_VAL);
        scanf("%d", &guess);

        if (guess == secret)
        {
            printf("You guessed correctly!\n");
            break;
        }

        else
        {
            distance = guess-secret;

            if (distance>0)
                printf("Your guess was hot,");

            else
                printf("Your guess was cold,");
        }
    }

    return 0;
}

Answer 2

这是代码，你需要知道一些事情：首先你需要比较数字之间距离的绝对值，因为当你减去得到距离时，你可能会得到一个负数。

而（first_guess！=秘密）其次，您不应该比较尚未阅读的值。

没有必要把 {} 放在 IFs 之外，你需要在 if 句子之后使用它。还要尝试稍微改善一下缩进。

最后，最重要的建议，回答你的问题是，如果你有一个if，检查一些条件，你不需要放另一个如果检查opossite条件，如果只有两个条件是可能的，只需使用另一个，如果需要，使用另一个如果第一个里面。

例：

错误的方式：

if (first_guess == secret)
    printf("You guessed correctly!\n");

if (first_guess != secret) {
    printf("Your guess was hot enter your next guess from (1 to %d)?\n", MAX_VAL);
    scanf("%d", &next_guess);
}

right way:

if (first_guess == secret)
    printf("You guessed correctly!\n");

else {
    printf("Your guess was hot enter your next guess from (1 to %d)?\n", MAX_VAL);
    scanf("%d", &next_guess);
}

解决方案将是：

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define MAX_VAL 100

#define ABSOLUTE(a) (((a)>0)?(a):(-a))

int main() {
    srand(time(0));
    int secret,new,newdistance,olddistance,ok;
    secret = 1 + rand()%MAX_VAL;
    printf ("secret is %d",secret);
    char clean;  
    do {
        printf(" enter your guess from (1 to %d)?\n", MAX_VAL);
        ok=scanf ("%d",&new);
        while ((clean=getchar())!='\n');
    } while(ok!=1);
    newdistance = (secret - new);
    do {
        if (new == secret)
        printf("You guessed correctly!\n");
        else {
            do {
                printf("enter your guess from (1 to %d)?\n", MAX_VAL);
                ok=scanf ("%d",&new);
                while ((clean=getchar())!='\n');
            } while(ok!=1);
            if (new == secret)
                printf("You guessed correctly!\n");
            else {
                olddistance=newdistance;
                newdistance=secret-new;
                if (ABSOLUTE(newdistance) < ABSOLUTE(olddistance))
                    printf("Your guess was hot,");
                else
                    printf("Your guess was cold,");
            }
        }
    } while (new!= secret);
    return (0);
}

我在 （（干净 = getchar（））！='\n'） 时添加了该行，以确保正确读取来自用户的每个输入。

如果宏给您带来问题，这里有一个使用函数而不是宏来计算绝对值的实现：

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define MAX_VAL 100


int absolute (int a) {
    return (a>0?a:-a);  
}


int main() {
    srand(time(0));
    int secret,new,newdistance,olddistance,ok,flagfirstguess;
    flagfirstguess=1;
    secret = 1 + rand()%MAX_VAL;
    printf ("secret is %d",secret);
    char clean;  
    do {
        printf(" enter your guess from (1 to %d)?\n", MAX_VAL);
        ok=scanf ("%d",&new);
        while ((clean=getchar())!='\n');
    } while(ok!=1);
    newdistance = (secret - new);
    do {
        if (new == secret)
            printf("You guessed correctly!\n");
        else {
            if (flagfirstguess==1) {
                printf("Your guess was hot enter your next guess from (1 to %d)?\n", MAX_VAL);
                flagfirstguess=0;
            }
            else {
                do {
                    printf("enter your guess from (1 to %d)?\n", MAX_VAL);
                    ok=scanf ("%d",&new);
                    while ((clean=getchar())!='\n');
                } while(ok!=1);
                if (new == secret)
                    printf("You guessed correctly!\n");
                else {
                    olddistance=newdistance;
                    newdistance=secret-new;
                    if (absolute(newdistance) < absolute(olddistance))
                        printf("Your guess was hot,");
                    else
                        printf("Your guess was cold,");
                }
            }
        }
    } while (new!= secret);
   return (0);
}

Answer 3

您的代码

if (first_guess != secret)
  printf("Your guess was hot enter your next guess from (1 to %d)?\n", 
    MAX_VAL);
  scanf("%d", &next_guess);

不做您认为它会做的事情，if语句只会影响printf语句，而不会影响scanf语句。您应该用大括号将语句括起来

if (first_guess != secret)
{
  printf("Your guess was hot enter your next guess from (1 to %d)?\n", 
    MAX_VAL);
  scanf("%d", &next_guess);
}

我不喜欢使用scanf()进行键盘输入，所以我会使用fgets()来指定最大缓冲区大小，然后将该值转换为整数，或者使用sscanf()进行转换

char buffer[32];
fgets( buffer, sizeof(buffer), stdin );
next_guess = atoi( buffer ); 

or

char buffer[32];
fgets( buffer, sizeof(buffer), stdin );
sscanf( buffer, "%d", &next_guess );

您应该始终初始化C中的所有变量

int next_guess = 0, first_guess = 0, secret, distance = 0;