get all lines from file c

#include <stdio.h> int main(int argc, char* argv[]) { char const* const fileName = argv[1]; /* should check that argc > 1 */ FILE* file = fopen(fileName, "r"); /* should check the result */ char line[256]; while (fgets(line, sizeof(line), file)) { /* note that fgets don't strip the terminating \n, checking its presence would allow to handle lines longer that sizeof(line) */ printf("%s", line); } /* may check feof here to make a difference between eof and io failure -- network timeout for instance */ fclose(file); return 0; }

how to print the file content each line in c

1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <string.h>
 4 
 5 int main(void) {
 6     // ...
 7 
 8     // "Empty" the string
 9     line[0] = '\0';
10 
11     while(fgets(chunk, sizeof(chunk), fp) != NULL) {
12         // Resize the line buffer if necessary
13         size_t len_used = strlen(line);
14         size_t chunk_used = strlen(chunk);
15 
16         if(len - len_used < chunk_used) {
17             len *= 2;
18             if((line = realloc(line, len)) == NULL) {
19                 perror("Unable to reallocate memory for the line buffer.");
20                 free(line);
21                 exit(1);
22             }
23         }
24 
25         // Copy the chunk to the end of the line buffer
26         strncpy(line + len_used, chunk, len - len_used);
27         len_used += chunk_used;
28 
29         // Check if line contains '\n', if yes process the line of text
30         if(line[len_used - 1] == '\n') {
31             fputs(line, stdout);
32             fputs("|*\n", stdout);
33             // "Empty" the line buffer
34             line[0] = '\0';
35         }
36     }
37 
38     fclose(fp);
39     free(line);
40 
41     printf("\n\nMax line size: %zd\n", len);
42 }

Posted by: Guest on May-24-2021

Source

Code answers related to "get all lines from file c"

Code answers related to "C"

Browse Popular Code Answers by Language

Answers for "get all lines from file c"

Code answers related to "get all lines from file c"

Code answers related to "C"

Browse Popular Code Answers by Language

Popular Programming Languages

Advertisements

Company

Compilers

Help

Connect with us