Lab1 by Ignat Borisov

lab1/main.c

@@ -0,0 +1,70 @@
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+int main(int argc, char **argv) {
+
+    if (argc != 3) {
+        printf("Wrong number of arguments. Must be three - executed program name, command and filename.");
+        return -1;
+    }
+
+    FILE *current = fopen(argv[2], "rb");
+    if (!current) {
+        printf("File couldn't be opened");
+        return -1;
+    }
+
+    if (!strcmp("-l", argv[1]) || !strcmp("-L", argv[1]) || !strcmp("--lines", argv[1])) {
+        getc(current);
+        if (feof(current)) {
+            printf("This file has 0 lines");
+            return 0;
+        }
+        fseek(current, 0, SEEK_SET);
+
+        int line_count = 1;
+        int now;
+        while (!feof(current)) {
+            now = getc(current);
+            if (now == '\n') line_count++;
+        }
+        if (line_count == 1) printf("This file has 1 line");
+        else printf("This file has %d lines", line_count);
+        fclose(current);
+        return 0;
+    }
+
+    if (!strcmp("-b", argv[1]) || !strcmp("-B", argv[1]) || !strcmp("--bytes", argv[1])) {
+        int byte_count = 0;
+        while (getc(current)) {
+            if (feof(current)) break;
+            byte_count++;
+        }
+        if (byte_count == 1) printf("This file has 1 byte");
+        else printf("This file has %d bytes", byte_count);
+        fclose(current);
+        return 0;
+    }
+
+    if (!strcmp("-w", argv[1]) || !strcmp("-W", argv[1]) || !strcmp("--words", argv[1])) {
+        int word_count = 0;
+        int now, prev = ' ';
+
+        while (!feof(current)) {
+            now = getc(current);
+            if ((isgraph(now)) && (!isgraph(prev)))
+                word_count++;
+            prev = now;
+        }
+
+        if (word_count == 1) printf("This file has 1 word");
+        else printf("This file has %d words", word_count);
+        fclose(current);
+        return 0;
+    }
+
+    printf("Wrong command");
+    fclose(current);
+    return -1;
+}