Changes to be committed:

new file:   proglabs/lab7-8/10.c
	new file:   proglabs/lab7-8/11.c
	new file:   proglabs/lab7-8/12.c
	new file:   proglabs/lab7-8/13.c
	new file:   proglabs/lab7-8/14.c
	new file:   proglabs/lab7-8/15.c
	new file:   proglabs/lab7-8/16.c
	new file:   proglabs/lab7-8/17.c
	new file:   proglabs/lab7-8/18.c
	new file:   proglabs/lab7-8/19.c
	new file:   proglabs/lab7-8/3
	new file:   proglabs/lab7-8/5.c
	new file:   proglabs/lab7-8/6
	new file:   proglabs/lab7-8/6.c
	new file:   proglabs/lab7-8/7.c
	new file:   proglabs/lab7-8/8.c
	new file:   proglabs/lab7-8/9
	new file:   proglabs/lab7-8/9.c
	new file:   proglabs/lab7-8/test
	new file:   proglabs/lab7-8/tmp.out

proglabs/lab7-8/18.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#define t1 8.75
+#define t2 9.33
+#define t3 10.00
+#define t4 11.20
+// #define t 10 //zp
+#define s 40 //sverh
+#define u 1.5 //sverh*
+#define n1 0.15 //tax1
+#define n2 0.2
+#define n3 0.25
+#define m1 300 //maxbeftax2
+#define m2 150
+
+int main() {
+    int h,sw,x,swt,exit,scan;
+    float t,tax,a;
+    exit = x = swt = scan = 1;
+    while(exit){
+        printf("hours: ");
+        scanf("%d", &h);
+        while (getchar() != '\n');
+        do{
+                printf("Choose tarif:\n");
+                printf("a) $%.2f/h\tb) $%.2f/h\n",t1,t2);
+                printf("c) $%.2f/h\td) $%.2f/h\n",t3,t4);
+                printf("q) exit\nInput: ");
+                sw = getchar();
+                switch(sw){
+                    case 'a': t = t1; swt = 0; break;
+                    case 'b': t = t2; swt = 0; break;
+                    case 'c': t = t3; swt = 0; break;
+                    case 'd': t = t4; swt = 0; break;
+                    case 'q': exit = 0; break;
+                }
+            }while(swt&&exit);
+
+        if(!swt && exit){
+            if (h>s){tax = a = (s*t + ((h-s) * (t*u)));}
+            else(tax = a = h*t);  
+
+            if (tax>m1)
+            {
+                if(tax>m2){tax = (m1*n1) + (m2*n2) + ((tax-m1-m2)*n3);}
+                else(tax = (m1*n1) + ((tax-m1)*n2));
+            }
+            else (tax*=n1);
+            printf("Acc: %.3f\nTax: %.3f\nReceived: %.3f\n",a,tax,a-tax);
+        }} 
+
+  return 0;
+}