Сделал 36 задание

Fourth/get_file.c

@@ -0,0 +1,23 @@
+#include "get_file.h"
+
+FILE * getFile(void)
+{
+    FILE * file;
+    char filename[50];
+
+    printf("Enter filename: ");
+    if (scanf("%s", filename) == 1)
+    {
+        file = fopen(filename, "r");
+        if (file == NULL) {
+            printf("Error file!\n");
+            return NULL;
+        } else {
+            return file;
+        }
+    } else
+    {
+        printf("Empty name!\n");
+        return NULL;
+    }
+}

Fourth/get_file.h

@@ -0,0 +1,8 @@
+#ifndef GET_FILE
+#define GET_FILE
+
+#include <stdio.h>
+
+FILE * getFile(void);
+
+#endif

Fourth/input.txt

@@ -0,0 +1,7 @@
+11
+2
+3
+4
+5
+6
+10

Fourth/main.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include "get_file.h"
+#include "max_difference.h"
+
+/*
+36 Çàäà÷à
+*/
+
+int max(int first, int second);
+int maxDifference(FILE * file);
+
+int main(void) {
+    FILE * file = getFile();
+    if (file == NULL) return -1;
+    printf("Maximum difference between elements is %d", maxDifference(file));
+    return 0;
+}

Fourth/makefile

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+all: main.o max_difference.o get_file.o
+	gcc main.o max_difference.o get_file.o && del *.o
+
+main.o: main.c
+	gcc -c main.c
+
+max_difference.o: max_difference.c
+	gcc -c max_difference.c
+
+get_file.o: get_file.c
+	gcc -c get_file.c

Fourth/max_difference.c

@@ -0,0 +1,23 @@
+#include "max_difference.h"
+
+int max(int first, int second) {
+    if (first > second) return first;
+    return second;
+}
+
+int maxDifference(FILE * file) {
+    int current, last, maxim;
+    if (fscanf(file, "%d", &current) != 1) {
+        printf("File is empty!\n");
+        return -1;
+    }
+
+    last = current;
+    maxim = 0;
+
+    while (fscanf(file, "%d", &current) == 1) {
+        maxim = max(maxim, abs(last - current));
+        last = current;
+    }
+    return maxim;
+}

Fourth/max_difference.h

@@ -0,0 +1,10 @@
+#ifndef MAX_DIFFERENCE
+#define MAX_DIFFERENCE
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int max(int first, int second);
+int maxDifference(FILE * file);
+
+#endif // MAX_DIFFERENCE