fgets segmentfault

segmentation fault error occurs when there is an illegal memory access in your code. It can happen for various reasons, such as dereferencing a null pointer, accessing out-of-bounds memory, or stack overflow.

In the case of "fgets," a segmentation fault can occur if you pass an invalid pointer as the first argument. Make sure that the pointer you pass to "fgets" is a valid memory address or has been properly allocated.

Here's an example of how to use "fgets" correctly:

#include <stdio.h>

int main() {
    char buffer[100];
    FILE* file = fopen("file.txt", "r");

    if (file == NULL) {
        printf("File could not be opened.\n");
        return 1;
    }

    if (fgets(buffer, sizeof(buffer), file) != NULL) {
        printf("Read line: %s", buffer);
    }

    fclose(file);
    return 0;
}

In this example, we open a file named "file.txt" in read mode and use "fgets" to read a line from it into the buffer. We check if the file was opened successfully and if "fgets" returns a non-null value before printing the contents of the buffer. Finally, we close the file.

Make sure to check for errors and validate your pointers when using functions that manipulate memory to avoid segmentation faults.