Done some more exercies from chapter 2

vagen_till_c/ch2/exercise2.c

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+#include <stdio.h>
+
+/* My solution to exercise 2, chapter 2 from "Vägen till C".
+ * Write a program to calculate how many km a car has been driven during a year
+ * a much fuel it consumes on avererage
+ */
+
+int main()
+{
+    float km_today, km_lastyear, fuel;
+    
+    printf("Odometer last year: ");
+    scanf("%f", &km_lastyear);
+    printf("Odometer today: ");
+    scanf("%f", &km_today);
+    printf("Total fuel consumed during the year: ");
+    scanf("%f", &fuel);
+
+    printf("\nTotal distance driven: %.1f\n", km_today-km_lastyear);
+    printf("Average fuel consumption: %.2f\n", fuel/(km_today-km_lastyear));
+
+    return 0;
+}
+

vagen_till_c/ch2/exercise3.c

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+#include <stdio.h>
+
+/* My solution to exercise 3, chapter 2, from the book "Vägen till C".
+ * Write a program to produce a table with the square and cube up to a given
+ * number, starting from 1.
+ */
+
+int main()
+{
+    int n, i, s;
+    s = 1;
+
+    printf("Enter an integer: ");
+    scanf("%d", &n);
+
+    printf(" i     i*i     i*i*i \n");
+    printf("===   =====   =======\n");
+
+    for(i=0; i<=n; i++)
+    {
+        printf(" %1d %7d %8d \n", s, s*s, s*s*s);
+        s++;
+    }
+
+    return 0;
+}
+

vagen_till_c/ch2/exercise4.c

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+#include <stdio.h>
+#define GOAL 100*1000000
+/* My solution to exercise 4, chapter 2 from "Vägen till C".
+ * A man is offered a highly dangerous job, with an unusual salary.
+ * First day he'll get 1 cent, second day 2 cents, third day 4 cents and so on.
+ * Write a program to calculate how many days he'll have to work to reach one
+ * million dollar.
+ */
+
+int main()
+{
+    int salary = 1;
+    int days = 1;
+    
+    while(salary<=GOAL)
+    {
+        salary = salary * 2;
+        days++;
+    }
+    printf("He'll have to work %d days to reach %d dollar\n", days, GOAL/100);
+}