924subject1.c

#include <stdio.h>
int main(){
  int i,n;
  float c;
  printf("c = ");  
  if(scanf("%f", &c) != 1 || c < 2) {
    puts("Wrong input.");
    return 1;
   }
  printf("n = ");  
  if(scanf("%d", &n) != 1 || n < 1) {
    puts("Wrong input.");
    return 1;
   }
  printf("c1=%f\n",c);
  for(i=2;i<=n;i++){
    c = (c*c+2)/(2*c);
      printf("c%d=%f\n",i,c);
  }
  return 0;
}