excursie.cpp: In function `long int tol(char*)': excursie.cpp:7: warning: `long int y' might be used uninitialized in this function excursie.cpp: In function `int main()': excursie.cpp:54: warning: char format, different type arg (arg 2) excursie.cpp:56: warning: char format, different type arg (arg 2) excursie.cpp:58: warning: char format, different type arg (arg 2) excursie.cpp:71: warning: comparison between signed and unsigned integer expressions excursie.cpp:90: warning: comparison between signed and unsigned integer expressions