fgets

问题 I can't understand why taking the input using fgets always gives me "Wrong password" for my program. However, when I use gets() , like gets(array); it works. Expected outputs: when the password is wrong, prints "Wrong Passwor" and for correct one, let me see my "access is granted": #include <stdio.h> #include <string.h> int main(void) { int n=15; char array[n]; int pass = 0; printf("\n Enter the password : \n"); fgets(array, n, stdin); if(strncmp(array, "password",n)) { printf ("\n Wrong

问题 Trying to read multiple line from file to store them in a structure made up of the string elements, however when I run the program it simply crashes and I haven't the faintest idea why. function in question: Hashtbl* loadfromfile(Hashtbl* hashtbl, char *path){ int i = 0; char line[100]; char* string[40]; FILE *f = fopen(path, "r"); if(f == NULL){ printf("FILE NO FOUND!"); }else{ while(fgets(line, sizeof(line), f)!=NULL){ strcpy(string[i],line); i++; } fclose(f); for(i = 0; i<(SIZE*2); i++){

问题 I do something like this: char buf[100]; int n = 0; char save[100][100]; while (fgets(buf,100, file)!=NULL) { strcpy(save[n], buf); printf("%s",buf); n++; } I opened a FILE = *file with error handling before. I only want to read the lines that have less than or equal to 100 characters. Those that feature more characters, I want to ignore and write some special message to the "save" array or to the perror or stout stream. However, how can I possibly know whether I got exactly 100 characters or

问题 I am looking to open up a file, grab the last line in the file where the line = "?>", which is the closing tag for a php document. Than I am wanting to append data into it and add back in the "?>" to the very last line. I've been trying a few approaches, but I'm not having any luck. Here's what I got so far, as I am reading from a zip file. Though I know this is all wrong, just needing some help with this please... // Open for reading is all we can do with zips and is all we need. if (zip

问题 I was working on a program in C to count the number of spaces in a sentence. But I haven't managed to get it to work properly. If I enter something like Hello world 1234 how are you the output I'm getting is 3 when the output expected is 5. My code is : //Program to count number of words in a given Sentence #include <stdio.h> #include <string.h> int main() { char sent[100]; char sentence[] = {' ', '\0'}; printf("\nEnter a sentence :\n"); gets(sent); strcat(sentence, sent); int l = strlen

问题 I have a WebDAV propfind request sent using PHP. The HTTP request looks like this: PROPFIND /path/to/whatever HTTP/1.1 User-Agent: My Client Accept-Encoding: deflate Depth: 1 Host: example.com Content-Type: text/xml;charset=UTF-8 Authorization: Basic bLahDeBlah= Content-Length: 82 Connection: close <?xml version='1.0' encoding='utf-8'?><propfind xmlns='DAV:'><allprop/></propfind> It works fine when the response XML is less than about 1.5 MB. When the response is bigger, the XML contains

问题 Am I using fgets() incorrectly? I am trying to build a linked list of strings ( char * ) adding each new line to the end of the LL. I am reading these lines from a file, but for some reason every line gets overwritten by the current line being processed, only when using fgets() inside the while loop, but the add function seems to be receiving each line correctly. If I add lines individually in main() there are no problems. Here is a sample input file: input.txt: This life, which had been the

问题 I want to read a text file and store it into an array data[512] . Here is the code: char filename = "send.txt"; //Open File FILE *in_file = fopen("send.txt", "r"); if(in_file == NULL){ printf("Error : couldn't oepn file"); } char data[512]; while(fgets(data, sizeof(data), in_file) != NULL){ printf("read size: %d \n", strlen(data)); ... } Why does strlen(data) each time return a different value? Why is data in not fully filled? EDIT When using fread() inside a while loop: printf("Start Reading

问题 I have an application that uses the following piece of code to run a cmd and get its output: std::string cmd = "ps -a -x -o pid,ppid,state,command | grep myProcess | grep -v 'grep' | awk '{ print $1, $2, $3 }'"; char buf[BUF_SIZE]; std::stringstream output; std::string err; int exitCode; FILE* proc = popen(cmd.c_str(), "r"); if (proc == NULL) { exit(1); } while (fgets(buf, BUF_SIZE, proc) != NULL) { output << buf; } exitCode = pclose(proc); std::string outputStr = output.str(); The problem I

问题 I'm relatively new to programming in C and am trying to read input from stdin using fgets . To begin with I thought about reading max 50 lines, max 50 characters each, and had something like: int max_length = 50; char lines[max_length][max_length]; char current_line[max_length]; int idx = 0; while(fgets(current_line, max_length, stdin) != NULL) { strcopy(lines[idx], current_line); idx++; } The snippet above successfully reads the input and stores it into the lines array where I can sort and