Simple_extract_number_float

#include <stdio.h>
#include <stdlib.h>

// Author: Sam Sampaio

int main(void) {

    char buffer[256] = {0};
    float v1[256] = {0}, v2[256] = {0}, v3[256] = {0};
    int i =0, j = 0, k = 0, l = 0;

    float *s[3] = {v1,v2,v3};

    int a, b;

    float x[256], y[256];


    FILE *fp;

    if(!(fp = fopen("arquivo.txt", "r"))) {
            perror("Msg: ");
            exit(EXIT_FAILURE);
    }

    while((buffer[i] = fgetc(fp)) != EOF) {
           if(buffer[i] >= '0' &&
              buffer[i] <= '9') {
            if(buffer[i-1] == '.' && buffer[i-2] >= '0'
              && buffer[i-2] <= '9') {
             a = buffer[i] - 48;
             b = buffer[i-2] - 48;
             x[j] = (b << 3) + (b << 1) + a;
             y[j] = x[j] / 10;
             s[l][k] = y[j];
             k++;
             j++;
               }
         }

           if(buffer[i] == '\n') {
                 l++;
                 k = 0;
             }

            i++;
    }
     fclose(fp);

    for(i=0; i < 3; i++)
      printf("%0.2f ", v1[i]);

     putchar('\n');

    for(i=0; i < 3; i++)
      printf("%0.2f ", v2[i]);

     putchar('\n');

    for(i=0; i < 3; i++)
      printf("%0.2f ", v3[i]);

     putchar('\n');

    return 0;
}