fgets

问题 void read_stdin(trace_t* trace, state_t state, action_t** action_list) { // initial stage int c; while ((c = getchar())!= EOF && c!='#') { if (my_isalpha(c)==LOWERCASE) { state[c-ASCII_CODE_LOWER_A] = '1'; } } printf("%s\n", state); char str[2]; fgets(str, 2, stdin); printf("%s", str); } If '#' is the last character I enter in the getchar() loop, fgets() records the newline character from when I press enter and skips to the print statement immediately (which prints the '\n') I could fix this

问题 My application needs to read like thousands of lines from a large csv file around 300GB with billion lines, each line contains several numbers. The data are like these: 1, 34, 56, 67, 678, 23462, ... 2, 3, 6, 8, 34, 5 23,547, 648, 34657 ... ... ... I tried fget reading file line by line in c, but it took really really really long, even with wc -l in linux, just to read all of the line, it took quite a while. I also tried to write all data to sqlite3 database based on the logics of the

问题 My application needs to read like thousands of lines from a large csv file around 300GB with billion lines, each line contains several numbers. The data are like these: 1, 34, 56, 67, 678, 23462, ... 2, 3, 6, 8, 34, 5 23,547, 648, 34657 ... ... ... I tried fget reading file line by line in c, but it took really really really long, even with wc -l in linux, just to read all of the line, it took quite a while. I also tried to write all data to sqlite3 database based on the logics of the

问题 I'm reading streams in PHP, using proc_open and fgets($stdout), trying to get every line as it comes in. Many linux programs (package managers, wget, rsync) just use a CR (carriage return) character for lines which periodically updates "in place", like download progress. I'd like to catch these updates (as separate lines) as soon as they happen. At the moment, fgets($stdout) just keeps reading until a LF, so when progress is going very slowly (big file for example) it just keeps on reading

问题 I am aware that we cannot read data into an uninitialized char pointer using fgets. There are quite a few questions relating to this very point here on stackoverflow. All the answers point to the fact that you can't load data into an uninitialized pointer variable. The program shown in the first code snippet is able to populate the first uninitialized char pointer (*str2) using fgets but, crashes while trying to read data into the second uninitialized char pointer (*str3). I can get it to

问题 I am aware that we cannot read data into an uninitialized char pointer using fgets. There are quite a few questions relating to this very point here on stackoverflow. All the answers point to the fact that you can't load data into an uninitialized pointer variable. The program shown in the first code snippet is able to populate the first uninitialized char pointer (*str2) using fgets but, crashes while trying to read data into the second uninitialized char pointer (*str3). I can get it to

问题 This question already has answers here : Input with char pointer vs. char array (6 answers) Closed 5 years ago . I am trying to take in string from keyboard. When I tried this it didn't work. char *s; fgets(s,80, stdin); I get a segmentation fault when I am trying to use the above code. However when I use below code it works, and I don't get a segmentation fault. char s[81]; fgets(s, 80, stdin); Why do I segmentation fault when I try to store the string using pointer ( char *s )? 回答1: This is

问题 Function fWord asks my input, and should return the first word it encounters (until the first space). It works on Online Visual Studio, but if I try to compile it with codeBlocks, my input doesn't get printed. #include <stdio.h> #include <string.h> #include <ctype.h> char * fWord(); char * test; int main() { test = fWord(); printf("%s\n", test); return 0; } char * fWord() // ONLY READ THE FIRST WORD { char buffer[20]; char * input = buffer; fgets(input, sizeof(input), stdin); input = strtok

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . Improve this question I'm trying to import CSVs or Unicode Text with Thai Characters into MySQL. There's no problem with MySQL saving Thai Characters. The problem is, when I use fgetcsv or fgets, I get garbage in exchange for the Thai Characters. Like for example, these characters,

问题 Title is pretty self explanatory. I'm almost sure that the end result wouldn't be a matrix as each line would have a different number of columns, so it's more like a array of arrays of variable sizes. It would also be interesting to sort the fragments by size, biggest first. This is what I've tried so far: int main() { char str[MAXLEN], **fragmentsList; int number_of_strings, i, max, k; printf("Enter .txt file name: "); scanf("%s", str); printf("How many strings does the file has? "); scanf("