How to read a text file line by line with an unlimited number of characters per line in C on Linux
To read a text file line by line with an unlimited number of characters per line in C on Linux, the best and most idiomatic way is to use getline(), which dynamically allocates (or reallocates) memory as needed.
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *file = fopen("your_file.txt", "r");
if (!file) {
perror("fopen");
return 1;
}
char *line = NULL; // Pointer to store the line
size_t len = 0; // Allocated buffer size
ssize_t read; // Number of characters read
while ((read = getline(&line, &len, file)) != -1) {
printf("Line: %s", line); // Print each line
}
free(line); // Free the allocated memory
fclose(file);
return 0;
}