Convert String of characters to Float dynamically - c

Question

I've been having some problems with this code below...
The main idea of the code is to read line by line and convert chars strings into floats and save the floats in a array called nfloat.
The input is a .txt containing this: n = the number of strings, in this case n = 3
3
[9.3,1.2,87.9]
[1.0,1.0]
[0.0,0.0,1.0]
The first number, 3 is the number of vectors as we can see in the image, but that number isn't static, the input can be 5 or 7, etc instead of 3.
So far, I've started doing the following, (for only 1 vector case) but the code has some memory errors I think:
int main(){
int n; //number of string, comes in the input
scanf("%d\n", &n);
char *line = NULL;
size_t len = 0;
ssize_t read;
read = getline(&line,&len,stdin); //here the program assigns memory for the 1st string
int numsvector = NumsVector(line, read);//calculate the amount of numbers in the strng
float nfloat[numsvector];
int i;
for (i = 0; i < numsvector; ++i)
{
if(numsvector == 1){
sscanf(line, "[%f]", &nfloat[i]);
}
else if(numsvector == 2){
if(i == 0) {
sscanf(line, "[%f,", &nfloat[i]);
printf("%f ", nfloat[i]);
}
else if(i == (numsvector-1)){
sscanf((line+1), "%f]", &nfloat[i]);
printf("%f\n", nfloat[i]);
}
}
else { //Here is where I think the problems are
if(i == 0) {
sscanf(line, "[%f,", &nfloat[i]);
printf("%f\n", nfloat[i]);
}
else if(i == (numsvector-1)) {
sscanf((line+1+(4*i)), "%f]", &nfloat[i]);
printf("%f\n", nfloat[i]);
}
else {
sscanf((line+1+(4*i)), "%f,", &nfloat[i]);
printf("%f\n", nfloat[i]);
}
}
}
Well, the problems come with the sscanf instructions I think, in the case of a string with two floats or one, the code works fine but in the case of 3 or more floats, the code doesn't work well and I can't understand why...
Here I attach the function too, but It seems to be correct... the focus of the problem remains on the main.
int NumsVector(char *linea, ssize_t size){
int numsvector = 1; //minimum value = 1
int n;
for(n = 2; n<= size; n++){
if (linea[n] != '[' && linea[n] != ']'){
if(linea[n] == 44){
numsvector = numsvector + 1;
}
}
}
return numsvector;
}
Please could someone help me understand where is the problem?

Answer 1

Ok - if you replace your current for loop with this, your nfloat array should end up with the right numbers in it.
/* Replaces the end ] with a , */
line[strlen(line) - 1] = ',';
/* creates a new pointer, pointing after the first [ in the original string */
char *p = line + 1;
do
{
/* grabs up to the next comma as a float */
sscanf(p, "%f,", &nfloat[i]);
/* prints the float it's just grabbed to 2 dp */
printf("%.2f\n",nfloat[i]);
/* moves pointer forward to next comma */
while (*(p++) != ',');
}
while (++i < numsvector); /* stops when you've got the expected number */