有人可以帮我找到错误。 [英] Can someone help me find the error.
问题描述
#include < stdio.h >
#include < conio.h >
#include < stdlib.h >
#include < time.h >
#define false 0
#define true 1
#define bool int
void responsegood（）;
void responsebad（）;
void generatePattern1（ int *， int < /跨度> *）;
void generatePattern2（ int *， int < /跨度> *）;
void generatePattern3（ int *， int < /跨度> *）;
int main（）
{
int a，b，no，mul;
char ch;
int i;
int 级别;
bool correct = true ;
int 传递;
srand（time（NULL））;
printf（ 选择难度级别（1-3）\ n< /跨度>）;
scanf（ ％d，& level）;
while （level！= - 1 ）{
< span class =code-keyword> do {
if （（level！= 1 && level！= 2 ）&&（level！= 3 && level！= - 1 ））{
printf（ 值无效\ n）;
printf（ 选择难度级别（1-3）\ n） ;
scanf（ ％d，& level）;
}
}
while （（level！= 1 && level！= 2 ）&&（level！= 3 & ;& level！= - 1 ））;
while （level！= - 1 ）{
do {
if （level == 1 ） {
generatePattern1（& a，& b）;
}
else if （level == 2 ）{
generatePattern2（& a，& b）;
}
else if （level == 3 ）{
generatePattern3（& a，& b）;
while （正确）
{
pass = 0 ;
for （i = 1 ; i< = 10 ; ++ i）{
a = rand（）％10;
b = rand（）％10;
printf（ ％d倍％d =， A，b）;
scanf（ ％d，& no）;
mul = a * b;
if （mul == no）
{
responsegood（）;
通过++;
}
else
{
responsebad（）;
}
}
如果（传递< 7 。 5 ）{
printf（ 请向老师寻求额外帮助。\ n）;
}
else {
printf（ 恭喜，您已准备好进入下一个级别！\ n）;
}
做 {
printf（ \ n想要尝试另一个乘法问题？如果是，则按'y'，然后'n'=）;
scanf（ ％c，& ch）;
if （ch == ' y' || ' Y'）
{
继续;
}
else if （ch == ' n' || ' N'）
{
correct = false ;
}
else
{
printf（ 无效值\ n）;
}
} while （（ch！= ' < span class =code-string> y'&& ch！= ' n'）&&（ch！= ' Y'&& ch！= ' N'））;
}
system（ pause ）;
return 0 ;
}
void responsegood（）
{
char rangood;
srand（time（NULL））;
rangood = 1 + rand（）％ 4 ;
switch （rangood）{
case 1 ：
printf（ 非常好！\ n \
）;
break ;
case 2 ：
printf（ 非常好！\ n \ n）;
break ;
case 3 ：
printf（ 干得好！\ n \\ n）;
break ;
case 4 ：
printf（ 保持良好的工作！\ n \ n）;
break ;
}
}
void responsebad（）
{
char ranbad;
srand（time（NULL））;
ranbad = 1 + rand（）％ 4 ;
switch （ranbad）{
case 1 ：
printf（ no.please再试一次！\\ \
\\\
）;
break ;
case 2 ：
printf（ 错误，请再试一次！\ n \ n）;
break ;
case 3 ：
printf（ 不要放弃！\ n\ n）;
break ;
case 4 ：
printf（ No.keep trying！\ n \ n）;
break ;}
}
void generatePattern1 （ int * a， int * b）{
* a = rand（）％9 +1;
* b = rand（）％9 + 1;
}
void generatePattern2（ int * a， int * b）{
* a = rand（）％99 + 1;
* b = rand（）％99 + 1;
}
void generatePattern3（ int * a， int * b）{
* a = rand（）％999 + 1;
* b = rand（）％999 + 1;
return ;
}
我的尝试：
i尝试了很多次，但我找不到错误。
编译并不代表你的代码是对的！ ：笑：
将开发过程想象成编写电子邮件：成功编译意味着您使用正确的语言编写电子邮件 - 例如英语而不是德语 - 而不是电子邮件包含您的邮件想发送。
所以现在你进入第二阶段的发展（实际上它是第四或第五阶段，但你将在之后的阶段进入）：测试和调试。
首先查看它的作用，以及它与你想要的有何不同。这很重要，因为它可以为您提供有关其原因的信息。例如，如果程序旨在让用户输入一个数字并将其翻倍并打印答案，那么如果输入/输出是这样的：
输入预期输出实际输出
1 2 1
2 4 4
3 6 9
4 8 16然后很明显问题出在将它加倍的位 - 它不会将自身加到自身上，或者将它乘以2，它会将它自身相乘并返回输入的平方。
所以，你可以查看代码和很明显，它在某处：
int Double （ int value ）
{
return value * 值;
}
一旦你知道可能出现的问题，就开始使用调试器找出原因。在您的行上设置一个断点：
while （level！= - 1）{
并运行你的应用程序。在执行代码之前，请考虑代码中的每一行应该做什么，并将其与使用Step over按钮依次执行每一行时实际执行的操作进行比较。它符合您的期望吗？如果是这样，请转到下一行。
如果没有，为什么不呢？它有何不同？
这是一项非常值得开发的技能，因为它可以帮助你在现实世界和发展中。和所有技能一样，它只能通过使用来改善！
我们无法告诉你问题是什么：我们不知道它应该做什么，你做了什么，你没想到，或者你做不到 - 但自己做这件事并不困难，你会在同一时间学到一些非常有价值的事情！
< blockquote> C ++ 101：使用C / C ++ / C＃语言，结构用 {和} 分隔，它们进入对，每个开放一个，有一个关闭的。
正如你在缩进后看到的那样，你的代码有一些} 缺失。学习缩进你的代码，它显示它的结构，它有助于阅读和理解。
span class =code-keyword> #include < stdio.h >
#include < conio.h >
#include < stdlib.h >
#include < time.h >
#define false 0
#define true 1
#define bool int
void responsegood（）;
void responsebad（）;
void generatePattern1（ int *， int < /跨度> *）;
void generatePattern2（ int *， int < /跨度> *）;
void generatePattern3（ int *， int < /跨度> *）;
int main（）
{
int A，b，无，MUL;
char ch;
int i;
int 级别;
bool correct = true ;
int 传递;
srand（time（NULL））;
printf（ 选择难度级别（1-3）\ n< /跨度>）;
scanf（ ％d，& level）;
while （level！= - 1 ）{
< span class =code-keyword> do {
if （（level！= 1 && level！= 2 ）&&（level！= 3 && level！= - 1 ））{
printf（ 值无效\ n）;
printf（ 选择难度级别（1-3）\ n） ;
scanf（ ％d，& level）;
}
}
while （（level！= 1 && level！= 2 ）&&（level！= 3 & ;& level！= - 1 ））;
while （level！= - 1 ）{
< span class =code-keyword> do {
if （level == 1 ）{
generatePattern1（& a，& b）;
}
else if （level == 2 ）{
generatePattern2（& a，& b）;
}
else if （level == 3 ）{
generatePattern3（& a，& b）;
while （正确）
{
pass = 0 ;
for （i = 1 ; i< = 10 ; ++ i）{
a = rand（）％10;
b = rand（）％10;
printf（ ％d倍％d =， A，b）;
scanf（ ％d，& no）;
mul = a * b;
if （mul == no）
{
responsegood（）;
通过++;
}
else
{
responsebad（）;
}
}
如果（传递< 7 。 5 ）{
printf（ 请向老师寻求额外帮助。\ n）;
}
else {
printf（ 恭喜，您已准备好进入下一个级别！\ n）;
}
做 {
printf（ \ n想要尝试另一个乘法问题？如果是，则按'y'，然后'n'=）;
scanf（ ％c，& ch）;
if （ch == ' y' || ' Y'）
{
继续;
}
else if （ch == ' n' || ' N'）
{
correct = false ;
}
else
{
printf（ 无效值\ n）;
}
} while （（ch！= ' < span class =code-string> y'&& ch！= ' n'）&&（ch！= ' Y'&& ch！= ' N'））;
}
system（ pause ）;
return 0 ;
}
void responsegood（）
{
char rangood;
srand（time（NULL））;
rangood = 1 + rand（）％ 4 ;
switch （rangood）{
case 1 ：
printf（ 非常好！\ n \
）;
break ;
case 2 ：
printf（ 非常好！\ n \ n）;
break ;
case 3 ：
printf（ 干得好！\ n \\ n）;
break ;
case 4 ：
printf（ 保持良好的工作！\ n \ n）;
break ;
}
}
void responsebad（）
{
char ranbad;
srand（time（NULL））;
ranbad = 1 + rand（）％ 4 ;
switch （ranbad）{
case 1 ：
printf（ no.please再试一次！\\ \
\\\
）;
break ;
case 2 ：
printf（ 错误，请再试一次！\ n \ n）;
break ;
case 3 ：
printf（ 不要放弃！\ n\ n）;
break ;
case 4 ：
printf（ No.keep trying！\ n \ n）;
break ;
}
}
void generatePattern1（ int * a， int * b）{
* a = rand（）％9 + 1;
* b = rand（）％9 + 1;
}
void generatePattern2（ int * a， int * b）{
* a = rand（）％99 + 1;
* b = rand（）％99 + 1;
}
void generatePattern3（ int * a， int * b）{
* a = rand（）％999 + 1;
* b = rand（）％999 + 1;
return ;
}
专业程序员的编辑器具有此功能，其他功能包括括号匹配和语法高亮。
Notepad++主页 [ ^ ]
ultraedit [ ^ ]
完成这些更正后，您需要学习调试器因为你的代码中还有其他问题。
有一个工具可以让你看到你的代码在做什么，它的名字是 debugger 。它也是一个很好的学习工具，因为它向你展示了现实，你可以看到哪种期望与现实相符。
当你不明白你的代码在做什么或为什么它做它做的时候，答案就是答案是调试器。
使用调试器查看代码正在执行的操作。只需设置断点并查看代码执行情况，调试器允许您逐行执行第1行并在执行时检查变量。
调试器 - 维基百科，免费的百科全书 [ ^ ]
掌握Visual Studio 2010中的调试 - 初学者指南 [ ^ ]
使用Visual Studio 2010进行基本调试 - YouTube [ ^ ]
调试器在这里向您展示您的代码正在做什么，您的任务是与什么进行比较应该这样做。
调试器中没有魔法，它没有找到错误，它只是帮助你。当代码没有达到预期的效果时，你就会接近一个错误。
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <time.h>
#define false 0
#define true 1
#define bool int
void responsegood();
void responsebad();
void generatePattern1(int*, int*);
void generatePattern2(int*, int*);
void generatePattern3(int*, int*);
int main()
{
int a,b,no,mul;
char ch;
int i ;
int level;
bool correct=true;
int passes;
srand(time(NULL));
printf("Choose your level of difficulty (1-3)\n");
scanf("%d", &level);
while (level !=-1){
do{
if((level != 1 && level != 2) && (level != 3 && level !=-1)){
printf("The value is invalid\n");
printf("Choose your level of difficulty (1-3)\n");
scanf("%d", &level);
}
}
while ((level !=1 && level !=2) && (level !=3 && level !=-1));
while (level !=-1){
do{
if(level == 1){
generatePattern1(&a, &b);
}
else if(level == 2){
generatePattern2(&a, &b);
}
else if(level == 3){
generatePattern3(&a ,&b);
while(correct)
{
passes=0;
for (i = 1 ; i <= 10 ; ++i ) {
a=rand()%10;
b=rand()%10;
printf("How much is %d times %d = ",a,b);
scanf("%d",&no);
mul=a*b;
if(mul==no)
{
responsegood();
passes++ ;
}
else
{
responsebad();
}
}
if ( passes < 7.5 ) {
printf( "Please ask your teacher for extra help.\n" );
}
else {
printf( "Congratulations , you are ready to go to the next level!\n " );
}
do{
printf("\nWant to try another multiplication question? If yes then press 'y' else 'n' = ");
scanf(" %c",&ch);
if(ch=='y'||'Y')
{
continue;
}
else if (ch=='n'||'N')
{
correct=false;
}
else
{
printf("invalid value\n");
}
}while ((ch !='y'&&ch !='n')&&(ch !='Y'&&ch !='N'));
}
system("pause");
return 0;
}
void responsegood()
{
char rangood;
srand(time(NULL));
rangood = 1 + rand() % 4;
switch (rangood){
case 1:
printf("Very good!\n\n");
break;
case 2:
printf("Excellent!\n\n");
break;
case 3:
printf("Nice work!\n\n");
break;
case 4:
printf("Keep up the good work!\n\n");
break;
}
}
void responsebad()
{
char ranbad;
srand(time(NULL));
ranbad = 1 + rand() % 4;
switch (ranbad){
case 1:
printf("no.please try again!\n\n");
break;
case 2:
printf("wrong,Try again!\n\n");
break;
case 3:
printf("Dont give up!\n\n");
break;
case 4:
printf("No.keep trying!\n\n");
break;}
}
void generatePattern1(int*a, int*b){
*a = rand() % 9+1;
*b = rand() % 9+1;
}
void generatePattern2(int*a, int*b){
*a = rand() % 99+1;
*b = rand() % 99+1;
}
void generatePattern3(int*a, int*b){
*a = rand() % 999+1;
*b = rand() % 999+1;
return;
}
What I have tried:
i tried many times but i just cant find the error.
Compiling does not mean your code is right! :laugh:
Think of the development process as writing an email: compiling successfully means that you wrote the email in the right language - English, rather than German for example - not that the email contained the message you wanted to send.
So now you enter the second stage of development (in reality it's the fourth or fifth, but you'll come to the earlier stages later): Testing and Debugging.
Start by looking at what it does do, and how that differs from what you wanted. This is important, because it give you information as to why it's doing it. For example, if a program is intended to let the user enter a number and it doubles it and prints the answer, then if the input / output was like this:
Input Expected output Actual output 1 2 1 2 4 4 3 6 9 4 8 16Then it's fairly obvious that the problem is with the bit which doubles it - it's not adding itself to itself, or multiplying it by 2, it's multiplying it by itself and returning the square of the input.
So with that, you can look at the code and it's obvious that it's somewhere here:
int Double(int value) { return value * value; }
Once you have an idea what might be going wrong, start using the debugger to find out why. Put a breakpoint on your line:
while (level !=-1){
and run your app. Think about what each line in the code should do before you execute it, and compare that to what it actually did when you use the "Step over" button to execute each line in turn. Did it do what you expect? If so, move on to the next line.
If not, why not? How does it differ?
This is a skill, and it's one which is well worth developing as it helps you in the real world as well as in development. And like all skills, it only improves by use!
We can't tell you what "the problem" is: we have no idea what it is expected to do, what it does that you didn't expect, or doesn't do that you did - but it's not difficult to do this yourself, and you will learn something really worthwhile at the same time!
C++ 101: With C/C++/C# languages, structures are delimited with{and}, they go in pairs, for each opening one, there is a closing one.
As you can see after indentation, your code have a couple}missing.
Learn to indent properly your code, it show its structure and it helps reading and understanding.
#include <stdio.h> #include <conio.h> #include <stdlib.h> #include <time.h> #define false 0 #define true 1 #define bool int void responsegood(); void responsebad(); void generatePattern1(int*, int*); void generatePattern2(int*, int*); void generatePattern3(int*, int*); int main() { int a,b,no,mul; char ch; int i ; int level; bool correct=true; int passes; srand(time(NULL)); printf("Choose your level of difficulty (1-3)\n"); scanf("%d", &level); while (level !=-1){ do{ if((level != 1 && level != 2) && (level != 3 && level !=-1)){ printf("The value is invalid\n"); printf("Choose your level of difficulty (1-3)\n"); scanf("%d", &level); } } while ((level !=1 && level !=2) && (level !=3 && level !=-1)); while (level !=-1){ do{ if(level == 1){ generatePattern1(&a, &b); } else if(level == 2){ generatePattern2(&a, &b); } else if(level == 3){ generatePattern3(&a ,&b); while(correct) { passes=0; for (i = 1 ; i <= 10 ; ++i ) { a=rand()%10; b=rand()%10; printf("How much is %d times %d = ",a,b); scanf("%d",&no); mul=a*b; if(mul==no) { responsegood(); passes++ ; } else { responsebad(); } } if ( passes < 7.5 ) { printf( "Please ask your teacher for extra help.\n" ); } else { printf( "Congratulations , you are ready to go to the next level!\n " ); } do{ printf("\nWant to try another multiplication question? If yes then press 'y' else 'n' = "); scanf(" %c",&ch); if(ch=='y'||'Y') { continue; } else if (ch=='n'||'N') { correct=false; } else { printf("invalid value\n"); } }while ((ch !='y'&&ch !='n')&&(ch !='Y'&&ch !='N')); } system("pause"); return 0; } void responsegood() { char rangood; srand(time(NULL)); rangood = 1 + rand() % 4; switch (rangood){ case 1: printf("Very good!\n\n"); break; case 2: printf("Excellent!\n\n"); break; case 3: printf("Nice work!\n\n"); break; case 4: printf("Keep up the good work!\n\n"); break; } } void responsebad() { char ranbad; srand(time(NULL)); ranbad = 1 + rand() % 4; switch (ranbad){ case 1: printf("no.please try again!\n\n"); break; case 2: printf("wrong,Try again!\n\n"); break; case 3: printf("Dont give up!\n\n"); break; case 4: printf("No.keep trying!\n\n"); break; } } void generatePattern1(int*a, int*b){ *a = rand() % 9+1; *b = rand() % 9+1; } void generatePattern2(int*a, int*b){ *a = rand() % 99+1; *b = rand() % 99+1; } void generatePattern3(int*a, int*b){ *a = rand() % 999+1; *b = rand() % 999+1; return; }
Professional programmer's editors have this feature and others ones such as parenthesis matching and syntax highlighting.
Notepad++ Home[^]
ultraedit[^]
Once you done those corrections, you will need to learn debugger because you have other problems in your code.
There is a tool that allow you to see what your code is doing, its name is debugger. It is also a great learning tool because it show you reality and you can see which expectation match reality.
When you don't understand what your code is doing or why it does what it does, the answer is debugger.
Use the debugger to see what your code is doing. Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.
Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't find bugs, it just help you to. When the code don't do what is expected, you are close to a bug.
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