#include <stdio.h>
int main(void) {
int N;
scanf("%d", &N);
float sum = 0.0f;
float x;
for (x = 1.0f; x < N; x += 0.1f) {
sum += x * x;
}
printf("%.1f", sum);
return 0;
}
This code reads an integer N, then attempts to sum the squares of numbers from 1.0 up to (but not including) N, stepping by 0.1. The result is printed with one decimal place.
- The loop uses a float variable x as the counter, incrementing by 0.1. Due to floating-point rounding, the loop may not stop exactly at N, and the number of iterations can be unpredictable. Consider using an integer loop counter instead.
- The problem likely expects a sum over integer values from 1 to N-1, but the step of 0.1 suggests a different intended range. Check whether the task asks for a sum over all numbers from 1 to N-1 with a step of 0.1, or over integers only.