add a new file to repo

practical102/Conversion.c

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+#include <stdio.h>
+#include <math.h>
+
+int main(void) {
+
+/* Declare variables */
+   int i,inum,tmp,numdigits;
+   float fnum;
+   char binnum[60];
+
+/* Intialise 4-byte integer */
+   inum = 33554431;
+/* Convert to 4-byte float */
+   fnum = (float) inum;
+
+
+/* Convert to binary number (string)*/
+   i = 0; tmp = inum;
+   while (tmp > 0) {
+     sprintf(&binnum[i],"%1d",tmp%2);
+     tmp = tmp/2;
+     i++;
+   }
+
+/* Terminate the string */
+   binnum[i] = '\0';
+
+
+/* Complete the expression */
+   numdigits = ceil(logf(inum)/logf(2)); /* this will tell us how digits "inum" has*/
+   printf("The number of digits is %d\n",numdigits); /* \n for line break, %d for integers */
+
+
+
+   printf("inum=%d,  fnum=%f, inum in binary=%s\n",
+      inum,fnum,binnum);
+   return 0; /* return 0 is needed to prevent void error in code*/
+}

practical102/Readme.txt

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+README
+
+Folder contains two sources codes, Conversion.c and Sum.c
+
+Conversion.c is compiled using gcc, and the output is called "conv". 
+
+-lm links the Math libary
+-Wall shows any warnings
+
+"numdigits" is an unused variable
+
+There is no return at the of the Conversion.c code. 
+
+Execute Conversion.c using the function ./conv
+
+
+Compile and run Sum.c using the command gcc

practical102/Sum.c

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+#include <stdio.h>
+
+
+int main(void) {
+/* Declare variables */
+   int i;
+   float sum1, sum2, diff;
+
+
+/* First sum */
+   sum1 = 0.0;
+   for (i=1; i<=1000; i++) {   /* Start i at 1 and increse by i value */
+      sum1 += 1./i;
+      // sum1 = sum1 + 1./i
+
+
+   }
+
+
+/* Second sum */
+   sum2 = 0.0;
+   for (i=1000; i>0; i--) {  /* start i at 1000 and then decrease i */
+      sum2 += 1./i;
+   }
+
+   printf(" Sum1=%f\n",sum1);
+   printf(" Sum2=%f\n",sum2);
+
+/* Find the difference */
+   diff = sum1 - sum2; //calculate the difference between sum1 and sum2
+
+   printf(" Difference between the two is %f\n",diff);
+
+   return 0; // return 0 is needed 
+
+}