Family Day update

Task/Call-an-object-method/C/call-an-object-method.c

@@ -0,0 +1,27 @@
+#include<stdlib.h>
+#include<stdio.h>
+
+typedef struct{
+        int x;
+        int (*funcPtr)(int);
+}functionPair;
+
+int factorial(int num){
+        if(num==0||num==1)
+                return 1;
+        else
+                return num*factorial(num-1);
+}
+
+int main(int argc,char** argv)
+{
+        functionPair response;
+
+        if(argc!=2)
+                return printf("Usage : %s <non negative integer>",argv[0]);
+        else{
+                response = (functionPair){.x = atoi(argv[1]),.funcPtr=&factorial};
+                printf("\nFactorial of %d is %d\n",response.x,response.funcPtr(response.x));
+        }
+        return 0;
+}