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

#define LINE_SIZE 100

int main() {

    char input[LINE_SIZE];
    memset (input, '\0', LINE_SIZE);
    char* end;

    do {
        char *citaj = fgets (input, LINE_SIZE, stdin);
        if (input[0] != '\n' || input == NULL) exit(0);
        float a;
        float b;
        float result;
        char seg_a[20];
        char operation[1];
        char seg_b[20];
        char seg_c[20];
        int i = 0;
        for (; i < LINE_SIZE; i++) {
            if ((input[i] >= '0' && input[i] <= '9') || input[i] == '.') {
                seg_a[i] = input[i];
            }
        }




        memset (input, '\0', LINE_SIZE);
    } while (input[0] != '\n')





    return 0;
}