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


/////////////////////////////////////////
struct T
{

    int nLen;        //  Длина строки

    int nInt;
    int nFloat;

    T()
    {

        nLen   = 0;
        nInt   = 0;
        nFloat = 0;
    }

    void check_int  (char *p);
    void check_float(char *p);

};

///////////////////////////////////////////////
int main()
{

    char sz[99] = "123,";

    T t_1;



    t_1.check_int(sz);

    if(t_1.nInt == 1)
    {
       printf("integer\n");
       goto L_01;
    }

    t_1.check_float(sz);
    if(t_1.nFloat  == 1)
    {
       printf("it is float\n");
       goto L_01;
    }

    printf("it is C-string\n");

L_01: return 0;

}


////////////////////////////////////////////////
void T::check_int(char *p)
{
    nLen = strlen(p);

    int nF = 1;

    for(int i = 0; i < nLen; i++)
    {

        if(p[i] < 48 || p[i] > 57) nF = 0;

    }

    if(nF == 1) nInt = 1;
}



////////////////////////////////////////////////
void T::check_float(char *p)
{

    int nPoint = 0;

    for(int i = 0; i < nLen; i++)
    {
        if(p[i] == 44)  nPoint ++;
    }


    if(nPoint == 1) nFloat = 1;
    else                return;

    int nF = 1;

    for(int i = 0; i < nLen; i++)
    {

        if((p[i] < 48 || p[i] > 57)  && p[i] != 44) nF = 0;

    }

    if(nF != 1)  nFloat = 0;

}