added c-files

c-file/big2.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+biggest()
+{
+    int num1, num2;
+    // Ask user to enter the two numbers
+    printf("Please Enter Two different values\n");
+    // Read two numbers from the user
+    scanf("%d %d", &num1, &num2);
+    if(num1 > num2)
+    {
+        printf("%d is Largest\n", num1);
+    }
+    else if (num2 > num1)
+    {
+        printf("%d is Largest\n", num2);
+    }
+    else
+    {
+        printf("Both are Equal\n");
+    }
+   // return 0;
+}

c-file/fact.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+ factorial() {
+    int n, i;
+    unsigned long long fact = 1;
+    printf("Enter an integer: ");
+    scanf("%d", &n);
+
+    // shows error if the user enters a negative integer
+    if (n < 0)
+        printf("Error! Factorial of a negative number doesn't exist.");
+    else {
+        for (i = 1; i <= n; ++i) {
+            fact *= i;
+        }
+        printf("Factorial of %d = %llu", n, fact);
+    }
+
+   // return 0;
+}

c-file/main.c

@@ -0,0 +1,7 @@
+#include<stdio.h>
+main() {
+
+         biggest();
+         factorial();
+        reverse();
+}

c-file/makefile

@@ -0,0 +1,12 @@
+ABC.exe:main.o big2.o fact.o rev.o
+	gcc -o ABC.exe main.o big2.o fact.o rev.o
+main.o:main.c
+	gcc -c main.c
+big2.o:big2.c
+	gcc -c big2.c
+fact.o:fact.c
+	gcc -c fact.c
+rev.o:rev.c
+	gcc -c rev.c
+clean:
+	rm -rf *.o

c-file/rev.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+reverse()
+{
+  char str[1000], rev[1000];
+  int i, j, count = 0;
+printf("\nEnter string to reverse");
+  scanf("%s", str);
+  printf("\nString Before Reverse: %s", str);
+  //finding the length of the string
+  while (str[count] != '\0')
+  {
+    count++;
+  }
+  j = count - 1;
+
+  //reversing the string by swapping
+  for (i = 0; i < count; i++)
+  {
+    rev[i] = str[j];
+    j--;
+  }
+
+  printf("\nString After Reverse: %s", rev);
+}