我正在编码一个文本游戏,其中将用户输入与我拥有的文本文件中可用的命令列表进行了比较。
它可以正常工作,但是我希望它循环,以便用户可以在输入命令之前执行多个操作,以打破循环并将程序移动。不幸的是,我的文件指针在循环的第二次迭代中变为NULL
,因此完全脱离了程序。
凹痕有些混乱,我对此表示歉意:
int mansionOutside(void)
{
int stop = 1; //control variable for while, yeah I know its a shit method of doing it, sue me
char choice[25]; //Variable to store user input
char word_match[15] = "outside"; //counter and .txt will be strcat to it
char text_line[73]; //size of line for txt files
char line1[25]; //takes current line being read from file
char temp[2]; //character and ' ' so counter can be made into a string and strcat into word_match
int counter = 1; //counts number of lines
int stop2 = 1;
while (stop2 == 1)
{
FILE *fptr;
fptr = fopen("mansion_commands.txt", "r"); //opens file
int lookdoor_counter = 0;
printf("%pn", fptr);
if (fptr == NULL)
{
perror("ERROR!"); //Error handling for not opening file
exit(EXIT_FAILURE);
}
else
{
while (stop == 1)
{
puts(""); //newline, as the previous function ends in a text line
fgets(choice, sizeof choice, stdin); //store input in choice with buffer overflow protection
while (fgets(line1, 25, fptr) != NULL) //reads until newline
{
if (strcmp(line1, choice) == 0) //if choice is equal to the current line
{
//printf("%sn", line1); //debugging print
if (strcmp(line1, "LOOK door") == 0)
{
lookdoor_counter++; //so that on entering LOOK door a second time, a different
//message will appear
}
stop = 0; // will exit from loop
break; //break ensures we can use the current counter value for later
}
else
{
counter++;
//printf("%s + %sn", line1, choice); //debugging
}
}
if (stop == 1)
{
printf("I dont understandn");
//printf("%dn", counter);
//printf("%sn", line1);
//printf("%sn", choice);
counter = 1; //counter is reset to be able to try again
rewind(fptr);
}
}
fclose(fptr);
if (lookdoor_counter == 2)
{
counter += 1;
}
counter = counter + '0'; //convert counter digit to its equivalent ascii
temp[0] = counter;
temp[1] = ' '; //temp becomes a string with counter and EOF char
//printf("%cn", counter);
strncat(word_match, temp , 1); //wordmatch gets counter strncat to it
strcat(word_match, ".txt"); /*If the string is found on the second line
word_match will be (outside2.txt), which contains the appropriate
message for that user command*/
//printf("%sn", word_match); //debugging
if (strcmp(word_match, "outside4.txt") == 0)
{
stop2 = 0;
}
fptr = fopen(word_match, "r"); //we open word_match file
if (fptr == NULL)
{
printf("ERROR!n"); //error handling
exit(EXIT_FAILURE);
}
else
{
//printf("Debugging : File opened Successfullyn");
while (fgets (text_line, 72, fptr) != NULL)
{
printf("%s", text_line); // Prints every Line with a 2 sec delay
//delay(2);
}
}
}
fclose(fptr);
}
return 1;
}
fptr = fopen("mansion_commands.txt", "r"); //opens file
if (!fptr)perror("fopen");
添加此条件,并查看实际错误是什么。也许您在FS上没有许可,或者路径不是真的,等等...