expresie.cpp: In function 'int main()': expresie.cpp:12: warning: comparison between signed and unsigned integer expressions expresie.cpp:14: warning: comparison between signed and unsigned integer expressions expresie.cpp:15: warning: comparison between signed and unsigned integer expressions expresie.cpp:22: warning: comparison between signed and unsigned integer expressions expresie.cpp:37: warning: comparison between signed and unsigned integer expressions expresie.cpp:38: warning: comparison between signed and unsigned integer expressions expresie.cpp:45: warning: comparison between signed and unsigned integer expressions expresie.cpp:48: warning: comparison between signed and unsigned integer expressions