#include <stdlib.h>
#include <stdio.h>
int main(int argc, char **argv) {
   int i,nmax=10;
   float *squares,sum=0.0f;
   if(argc<2) {
	   printf("Argument missing\n");
	   exit(-1);
   }
   squares=(float*)malloc(sizeof(float)*nmax);
   nmax=atoi(argv[1]);
   for(i=0;i<nmax;i++) {
	   squares[i]=i*1.0f;
	   sum+=squares[i];
   }
   printf("Sum = %f\n",sum);
   //free(squares);
}