C Program to show use of command line arguments

 #include<stdio.h>  
 #include<conio.h>  
 #include<stdlib.h>  
 void main(int argc,char *argv[])  
 {  
 int sum=0,i;  
 //if wrong number of command line arguments
 if(argc<3)  
 {  
 printf("Incorrect number of arguments:\n");  
 getch();  
 return 0;  
 }  
 //Add all the numbers entered using atoi function  
 for(i=1;i<argc;i++)  
 {  
 sum+=atoi(argv[i]);  //string to number
 }  
 //print the sum  
 printf("Ans=%d",sum);  
 getch();  
 }