尝试使用以下代码块语言构建程序：
1 to 100生成随机密码，并要求用户猜出该号码。 我当前的程序提供了关于猜测是热还是冷的错误输出，也不确定我应该放置( vs {的位置（如果有的话）或使用"if" vs "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;
}
答案 0 :(得分：1)
你的代码
if (first_guess != secret)
printf("Your guess was hot enter your next guess from (1 to %d)?\n",
MAX_VAL);
scanf("%d", &next_guess);
不按照您的想法执行，if语句只会影响printf语句而不影响scanf语句。您应该将语句括在大括号中
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scanf（）用于键盘输入，所以我会使用fgets（）来指定最大大小缓冲区然后将值转换为整数或者使用sscanf（）来转换
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;
答案 1 :(得分：0)
我不知道为什么你需要猜测这个游戏。这将是我的版本：
#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;
}
答案 2 :(得分：0)
查看我去年试过的这个例子
#include "stdio.h"
#include "conio.h"
#include "stdlib.h"
#include "math.h"
#include "time.h"
int main(void)
{
int n,a,count=0,l,score=0;
char ch;
do
{
count=0;
srand(time(NULL));
a=rand()%100+1; //RANGE OF NUMBER, here it is 1 to 100
printf("Select Level\n");
printf("1)Easy\n");
printf("2)Medium\n");
printf("3)Hard\n");
scanf("%d",&n);
if(n==1)
l=20;
else if(n==2)
l=10;
else
l=6;
printf("Enter a number between 1 to 100\n");
while(count!=l)
{
scanf("%d",&n);
//system("cls");
if(n==a)
{
printf("\nYou win...!!!\n %d is the Correct Number.",n);
break;
}
else if(n>a)
{
printf("\n%d is Too High...!!!",n);
count++;
}
else
{
printf("\n%d is Too Low...!!!",n);
count++;
}
if(count==l)
{
printf("\nCorrect Number is %d\n",a);
break;
}
printf("\nYou have %d chance left.\n",l-count);
}
printf("Do You Want To Play More ... (Press y)");
ch=getch();
}
while(ch=='y' || ch=='Y');
getch();
return 0;
}
答案 3 :(得分：0)
以下是代码，您需要了解一些事项： 首先，你需要比较数字之间的距离的绝对值，因为当你减去距离时，你可以获得一个负数。
while (first_guess != secret)
第二，你不应该比较你已经读过的价值。
无需将{}放在IF之外，您需要在if句后使用它。也尝试稍微改善你的缩进。
最后，最重要的建议，回答你的问题是，如果你有if检查某些条件，你不需要再设置if来检查opossite条件如果只有两个条件是posibble，只需使用else，如果需要，请在第一个if else内使用其他else。
示例：
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);
}
我添加了行while ((clean=getchar())!='\n');以确保用户的每个输入都被正确加入。
如果宏导致问题，这里是一个使用函数计算绝对值而不是宏的实现：
#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);
}