triunghi.cpp: In function 'int main()': triunghi.cpp:18: warning: comparison between signed and unsigned integer expressions triunghi.cpp:21: warning: comparison between signed and unsigned integer expressions triunghi.cpp:31: warning: comparison between signed and unsigned integer expressions triunghi.cpp:38: warning: comparison between signed and unsigned integer expressions triunghi.cpp:43: warning: comparison between signed and unsigned integer expressions triunghi.cpp:44: warning: comparison between signed and unsigned integer expressions triunghi.cpp:49: warning: comparison between signed and unsigned integer expressions triunghi.cpp:54: warning: comparison between signed and unsigned integer expressions triunghi.cpp:59: warning: comparison between signed and unsigned integer expressions