diff --git a/c-files/Makefile b/c-files/Makefile
new file mode 100644
index 0000000..db6bf5e
--- /dev/null
+++ b/c-files/Makefile
@@ -0,0 +1,10 @@
+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
diff --git a/c-files/big2.c b/c-files/big2.c
new file mode 100644
index 0000000..c6672d0
--- /dev/null
+++ b/c-files/big2.c
@@ -0,0 +1,22 @@
+#include <stdio.h>  
+   
+void biggest() {  
+    int a, b;  
+    printf("Please Enter Two different values\n");  
+    scanf("%d %d", &a, &b);  
+    
+    if(a > b) 
+    {
+        printf("%d is Largest\n", a);          
+    } 
+    else if (b > a)
+    { 
+        printf("%d is Largest\n", b);  
+    } 
+    else 
+    {
+	printf("Both are Equal\n");
+    }
+   
+    //return 0;  
+}
diff --git a/c-files/fact.c b/c-files/fact.c
new file mode 100644
index 0000000..a31a67b
--- /dev/null
+++ b/c-files/fact.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+void 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", n, fact);
+    }
+
+    //return 0;
+}
diff --git a/c-files/main.c b/c-files/main.c
new file mode 100644
index 0000000..29de770
--- /dev/null
+++ b/c-files/main.c
@@ -0,0 +1,5 @@
+main() {
+        biggest();
+        factorial();
+        reverse();
+}
diff --git a/c-files/rev.c b/c-files/rev.c
new file mode 100644
index 0000000..86d71be
--- /dev/null
+++ b/c-files/rev.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <string.h>
+void reverse() {
+   char string[20],temp;
+   int i,length;
+   printf("Enter String : ");
+   scanf("%s",string);
+   length=strlen(string)-1;
+   for(i=0;i<strlen(string)/2;i++){
+      temp=string[i];
+      string[i]=string[length];
+      string[length--]=temp;
+   }
+   printf("Reverse string :%s\n",string);
+}