Сделал 22 Задание

22Ex/input.txt

@@ -0,0 +1 @@
+1 2 3 4 5

22Ex/main.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include "tools.h"
+#include "make_increasing.h"
+
+/*
+23 Task
+Example:
+1 2 3 4 5 - possible
+2 1 3 5 4 - impossible
+*/
+
+int main(void) {
+    FILE * file = getFile();
+    if (file == NULL) return 1;
+    if (makeIncreasing(file) != TRUE) {
+        printf("No, it is impossible");
+        return 1;
+    } else printf("Yes, it is possible");
+
+    return 0;
+}

22Ex/make_increasing.c

@@ -0,0 +1,21 @@
+#include "make_increasing.h"
+
+int makeIncreasing(FILE * file) {
+    double current, next;
+    unsigned short used = 0;
+
+    if (fscanf(file, "%lf", &current) != 1) {
+        printf("File is empty!");
+        return 0;
+    }
+
+    while (fscanf(file, "%lf", &next) == 1) {
+        if ((next - current) < DISREG) {
+            if (used == TRUE) return 0;
+            used = TRUE;
+        }
+        current = next;
+    }
+
+    return 1;
+}

22Ex/make_increasing.h

@@ -0,0 +1,12 @@
+#ifndef MAKE_INCREASING
+#define MAKE_INCREASING
+
+#include <stdio.h>
+#include <math.h>
+
+#define DISREG 1.e-6
+#define TRUE 1
+
+int makeIncreasing(FILE * file);
+
+#endif

22Ex/makefile

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+all: main.o make_increasing.o tools.o
+	gcc main.o make_increasing.o tools.o && del *.o
+
+main.o: main.c
+	gcc -c main.c
+	
+make_increasing.o: make_increasing.c
+	gcc -c make_increasing.c
+
+tools.o: tools.c
+	gcc -c tools.c

22Ex/tools.c

@@ -0,0 +1,23 @@
+#include "tools.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;
+    }
+}

22Ex/tools.h

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