问如何读取长度不确定的数字输入？

EN

5 1.2 2.3 3.4 4.5 5.6

...
int i = 0, j, k;
float value, *ptr;
// For every element in inputArr...
while (i < inputLength) {
    printf("Enter the number of values in this data set, followed by the values: ");
    // Get the int value for array creation...
    scanf("%d ", &j);
    printf("%d", j);
    // Save it for the calculations later.
    *(lengths + i) = j;
    // Create dynamic array of floats.
    *(inputArr + i) = calloc(j, sizeof(float));
    ptr = *(inputArr + i);
    // For the rest of the input read the floats and place them.
    k = 0;
    while (k < j-1) {
        scanf("%f ", &value);
        *(ptr + k) = value;
        k++;
    }
    scanf("%f\n", &value);
    *(ptr + j - 1) = value;
    i++;
}