fgets

I have a parent and a child prozess and want to write an EOF from the parent to the child via a pipe... how does this work? here is my attampt: ---parent code--- if(dup2(parent_pipe[1], STDOUT_FILENO) == -1) { /*stdout gets closed and parent_pipe is duplicated with id of stdout*/ error("Can't duplicate the write-end of the pipe to stdout!"); } if(close(parent_pipe[0]) == -1) { error("Can't close read-end of the pipe!"); } char blub[] = "EOF"; if(write(parent_pipe[1], blub, strlen(blub)) == -1) { error("Failed to write the array"); } ---child code--- if(dup2(parent_pipe[0], STDIN_FILENO) == -1)

I have little program where I want to ask for an option and then for a filename. //Some code before printf("######################\n"); printf("# 1. Register a file #\n"); printf("# 2. Get global list #\n"); printf("# 3. Download a file #\n"); printf("# 4. Quit / Exit #\n"); printf("######################\n"); printf("Enter decision: "); fflush(stdin); action = getchar(); action -= '0'; sprintf(input, "[%d]--", action); switch (action) { case 1: printf("Enter file name: "); fflush(stdin); fgets(input+strlen(input), LINE_LEN, stdin); input[strlen(input)] = (input[strlen(input)] == '\n') ? 0 :

Is this safe to do? Does fgets terminate the buffer with null or should I be setting the 20th byte to null after the call to fgets and before I call clean ? // strip new lines void clean(char *data) { while (*data) { if (*data == '\n' || *data == '\r') *data = '\0'; data++; } } // for this, assume that the file contains 1 line no longer than 19 bytes // buffer is freed elsewhere char *load_latest_info(char *file) { FILE *f; char *buffer = (char*) malloc(20); if (f = fopen(file, "r")) if (fgets(buffer, 20, f)) { clean(buffer); return buffer; } free(buffer); return NULL; } Yes fgets() always

I am using gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2 I am writing a very simple script to take string as input and print the same with the some custom message. First user enters the T(no. of times to take string) and then takes input by fgets . . I used this & this as reference. I am getting a very strange output ie fgets is adding some extra new lines and even loop is not working properly for T=2 it is asking input only once. Can anybody explain me what is wrong with snippet. Thanks in advance! #include<stdio.h> #include<string.h> int main() { int T; scanf("%d",&T); while(T--){ char str[100]={""};

Basically as the title says.. When my program is run from the console, it'll ask if you'd like to encrypt or decrypt.. and when I input e or E, it creates a new blank line (until I input some kind of text), then shows the "enter the text" and "enter the key" lines all at once.. So, in the console it would look something like: Would you like to (E)ncrypt or (D)ecrypt? e asdf jkl; <---- random user input to get the program to continue.. Enter the text you would like to encrypt : Enter a key to use for encryption : (user input) and then the program exits.. //message to be encrypted char text[250]

http://poj.org/problem?id=3094 学习fgets的使用，注意fgets是会连换行一起保存的。 #include<algorithm> #include<cmath> #include<cstdio> #include<cstring> #include<iostream> #include<map> #include<set> #include<stack> #include<string> #include<queue> #include<vector> using namespace std; typedef long long ll; char s[10000]; int main() { #ifdef Yinku freopen("Yinku.in", "r", stdin); #endif // Yinku while(1) { fgets(s + 1, 10000 - 1, stdin); if(s[1] == '#') break; ll sum = 0; int n = strlen(s + 1); for(int i = 1; i <= n; ++i) { if(isupper(s[i])) sum += 1ll * i * (s[i] - 'A' + 1); } printf("%lld\n", sum); } } 来源： https

Possible Duplicate: Why does printf not flush after the call unless a newline is in the format string? (in C) I am getting a problem using printf and fgets as in my code printf is written earlier then fget but it does not run, it runs after fgets runs. enum { max_string = 127 }; static char string[max_string+1] = ""; int main( int argc, char ** argv ) { printf("Type a String: "); fgets(string, max_string, stdin); printf("The String is %s\n", string); return 0; } do a flush of the stdout fflush(stdout); before fgets(...) printf("Type a String: "); fflush(stdout); fgets(string, max_string, stdin