linux c fgets

char *fgets(char *str, int n, FILE *stream);

#include <stdio.h>

int main() {
    FILE *file;
    char line[256];

    file = fopen("example.txt", "r");
    if (file == NULL) {
        perror("Error opening file");
        return 1;
    }

    while (fgets(line, sizeof(line), file)) {
        printf("%s", line);
    }

    fclose(file);
    return 0;
}

if (fgets(line, sizeof(line), file) == NULL) {
    if (feof(file)) {
        printf("End of file reached.\n");
    } else if (ferror(file)) {
        perror("Error reading file");
    }
}

char *newline = strchr(line, '\n');
if (newline) *newline = '\0';

while (fgets(line, sizeof(line), file)) {
    // Trim leading and trailing whitespace
    char *trimmed = line;
    while (*trimmed == ' ') trimmed++;
    char *end = trimmed + strlen(trimmed) - 1;
    while (end > trimmed && *end == ' ') end--;
    *(end + 1) = '\0';

    if (*trimmed != '\0') {
        printf("%s\n", trimmed);
    }
}