#include <stdio.h>
#include <string.h>
struct date {int h; int m; int s;};
int main(void)
{
    char s[] = "$GPGGA,191410,"\
                "4735.5634,N,00739.3538,E,"\
                "1,04,4.4,351.5,M,48.0,M,,*45";
    char *wort;
    char buffer[10];
    struct date test;
    wort = strtok(s, ",");
    printf("\t%s\r\n", wort);
    wort = strtok(NULL, ",");
    printf("\t%s\r\n", wort);
    strncpy(buffer, wort, 7);
    
    test.h = (buffer[0] - '0') *10;
    test.h += (buffer[1] - '0');
    test.m = (buffer[2] - '0') *10;
    test.m += (buffer[3] - '0');
    test.s = (buffer[4] - '0') *10;
    test.s += (buffer[5] - '0');
    printf ("_ %2d:%2d:%2d\r\n", test.h, test.m, test.s);
    return 0;
}