C Programming Basic - Question and answers

How do you declare a pointer to an integer in C?

RK

RK Khadgaokar

2 years ago

I'm developing a simple C program for a school project, and I'm using fgets() to read user input, but it's not working correctly—it sometimes skips inputs or reads garbage. How do I resolve this?

C Programming Basic troubleshooting input-buffering

I'm creating a menu-driven program where users can enter choices and data. I've implemented fgets() for safety, but after the first input, subsequent calls seem to fail or behave oddly. Here's what I've tried:Using fgets() with a buffer size of 100.Checking for NULL returns, but it doesn't help.The issue occurs especially after using scanf() earlier in the code. I suspect buffer issues, but I'm not sure how to fix it cleanly.

PG

Pranay Gade

1 week ago

I'm trying to write a C function to dynamically allocate and manipulate a string array, but my program keeps crashing with a segmentation fault when I try to free the memory. What's the best way to avoid this?

C Programming Basic Debugging memory-management

I'm working on a project where I need to store multiple strings using dynamic memory allocation. I'm using malloc to allocate an array of char pointers, then allocating each string with strdup. After processing, when I call free on the array and each string, it crashes with a segmentation fault. Here's a simplified version of my code:char **arr = malloc(3 * sizeof(char *)); arr[0] = strdup("hello"); arr[1] = strdup("world"); arr[2] = strdup("test"); // ... do something ... for (int i = 0; i < 3; i++) { free(arr[i]); } free(arr);I've compiled with -g and used gdb, but I'm not sure if I'm freeing in the right order or if there's a memory corruption issue. Any tips?

ED

Emily Davis

1 week ago

I'm writing a simple C program that needs to read a user's full name including spaces, but when I use scanf, it only captures the first word. What's the correct way to handle this?

C Programming Basic input-output string-handling

I'm a beginner working on a project for my C programming course. I tried using scanf("%s", name); to read the name, but it stops at whitespace. I then switched to fgets(name, 100, stdin); which reads the entire line, but it leaves a newline character in the string. I've attempted to trim it with a loop, but it's messy. Could you advise on a clean solution for basic C programs?

MG

Maria Garcia

1 week ago