gets

This question already has an answer here: Why is the gets function so dangerous that it should not be used? 11 answers The declaration of gets is: char * gets ( char * str ); Note the glaring omission of a maximum size for str . cplusplus.com says 2 : Notice that gets is quite different from fgets: not only gets uses stdin as source, but it does not include the ending newline character in the resulting string and does not allow to specify a maximum size for str ( which can lead to buffer overflows ). And also: The most recent revision of the C standard (2011) has definitively removed this

I understand that an 'implicit declaration' usually means that the function must be placed at the top of the program before calling it or that I need to declare the prototype. However, gets should be in the stdio.h files (which I have included). Is there any way to fix this? #include <stdio.h> #include <stdlib.h> int main(void) { char ch, file_name[25]; FILE *fp; printf("Enter the name of file you wish to see\n"); gets(file_name); fp = fopen(file_name,"r"); // read mode if( fp == NULL ) { perror("Error while opening the file.\n"); exit(EXIT_FAILURE); } } You are right that if you include

If the code is scanf("%s\n",message) vs gets(message) what's the difference?It seems that both of them get input to message. The basic difference [in reference to your particular scenario], scanf() ends taking input upon encountering a whitespace , newline or EOF gets() considers a whitespace as a part of the input string and ends the input upon encountering newline or EOF . However, to avoid buffer overflow errors and to avoid security risks, its safer to use fgets() . Disambiguation: In the following context I'd consider " safe " if not leading to trouble when correctly used. And " unsafe "

Coderbyte is an online coding challenge site (I found it just 2 minutes ago). The first C++ challenge you are greeted with has a C++ skeleton you need to modify: #include <iostream> #include <string> using namespace std; int FirstFactorial(int num) { // Code goes here return num; } int main() { // Keep this function call here cout << FirstFactorial(gets(stdin)); return 0; } If you are little familiar with C++ the first thing * that pops in your eyes is: int FirstFactorial(int num); cout << FirstFactorial(gets(stdin)); So, ok, the code calls gets which is deprecated since C++11 and removed

Based on the most recent draft of C++11, C++ refers to ISO/IEC 9899:1999/Cor.3:2007(E) for the definitions of the C library functions (per §1.2[intro.refs]/1). Based on the most recent draft of C99 TC3, The gets function is obsolescent, and is deprecated. (per §7.26.9/2) Can I safely say that gets() is deprecated in both C and C++? Does it matter? The only way you can ever use gets is if stdin is known to be attached to a file whose contents you have full control over. This condition is almost impossible to satisfy, especially on multiprocess systems where other processes may modify files

main() { char name[20]; printf("enter your name\n"); scanf("%s",name); printf("%s",name); gets(name); puts(name); } input: Sampad Saha Output Sampad Saha Here puts only uses the input taken from gets() . as, if I omit this printf() the output would be Saha So here puts does not print anything given through scanf() . main() { char color[20]; printf("enter your name\n"); scanf("%s",color); puts(color); } But here puts() uses the input taken from scanf() also. Sourav Ghosh The problem here is, for an input like abc XYZ the code scanf("%s",name); reads only the "abc" part and the "XYZ" is left in

After wasting too much time searching why my program doesn't execute gets() after using scanf(), I found a solution which is to use fflush(stdin) after scanf() to enable gets() to get a string. The problem is that fflush(stdin) doesn't do what is expected from it: The program continues skipping gets() and I can't write any phrase in the console to be read. My code is the next one: #include <string.h> #include <stdio.h> int main(){ char nombre[10]; char mensaje[80]; printf("Type your name:\n"); scanf("%s", nombre); fflush(stdin); printf("Now, type a message:\n"); gets(mensaje); printf("3/%s:%s"