10 Best C Language Projects

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#define MAX_LINE 1024

int main() {
    // Create a sample text file for demonstration
    FILE *sample = fopen("sample.txt", "w");
    fprintf(sample, "Hello World!\nThis is a test file.\nIt has multiple lines.\n");
    fclose(sample);
    
    FILE *file = fopen("sample.txt", "r");
    if (!file) {
        printf("Error opening file\n");
        return 1;
    }
    
    int lines = 0, words = 0, chars = 0;
    int freq[256] = {0}; // Character frequency array
    char line[MAX_LINE];
    
    // Read file line by line
    while (fgets(line, MAX_LINE, file)) {
        lines++;
        chars += strlen(line);
        
        // Count characters frequency
        for (int i = 0; line[i]; i++) {
            freq[(unsigned char)line[i]]++;
        }
        
        // Count words (space-separated tokens)
        int in_word = 0;
        for (int i = 0; line[i]; i++) {
            if (isspace(line[i])) {
                in_word = 0;
            } else if (!in_word) {
                in_word = 1;
                words++;
            }
        }
    }
    
    fclose(file);
    
    // Display statistics
    printf("=== Text File Statistics ===\n");
    printf("Lines: %d\n", lines);
    printf("Words: %d\n", words);
    printf("Characters: %d\n\n", chars);
    
    printf("Top 5 Character Frequencies:\n");
    // Simple bubble sort to find top 5
    for (int k = 0; k < 5; k++) {
        int max_idx = 0;
        for (int i = 1; i < 256; i++) {
            if (freq[i] > freq[max_idx]) {
                max_idx = i;
            }
        }
        if (freq[max_idx] > 0) {
            if (isprint(max_idx)) {
                printf("'%c': %d\n", max_idx, freq[max_idx]);
            } else {
                printf("(ASCII %d): %d\n", max_idx, freq[max_idx]);
            }
            freq[max_idx] = 0; // Remove from next search
        }
    }
    
    return 0;
}