Print Patterns Matching From a File

1#include <stdio.h>
2#include <string.h>
3
4int main() {
5    FILE *file;
6    char line[256];
7    char pattern[50];
8    int lineNum = 0, matches = 0;
9    
10    printf("Enter pattern to search: ");
11    scanf("%49s", pattern);
12    
13    file = fopen("data.txt", "r");
14    if (file == NULL) {
15        printf("Cannot open file!\n");
16        return 1;
17    }
18    
19    printf("\nMatching lines:\n");
20    printf("===============\n");
21    
22    while (fgets(line, sizeof(line), file)) {
23        lineNum++;
24        if (strstr(line, pattern) != NULL) {
25            printf("Line %d: %s", lineNum, line);
26            matches++;
27        }
28    }
29    
30    printf("\nTotal matches: %d\n", matches);
31    
32    fclose(file);
33    return 0;
34}