Can anybody figureout what is the wrong with below code

// Declare second integer, double, and String variables.

int ii;
double dd;
char ss[80];
char newStr[200];        
// Read and save an integer, double, and String to your variables.
scanf("%d\n %lf\n %[^EOF]s\n", &ii, &dd, ss);
// Print the sum of both integer variables on a new line.
printf("%d\n", i+ii);    
// Print the sum of the double variables on a new line.
printf("%.1f\n", d+dd);    
// Concatenate and print the String variables on a new line
// The 's' variable above should be printed first.
strcat(newStr, s);
strcat(newStr, ss);
puts(newStr);