reteta.cpp: In function 'int quantity()': reteta.cpp:11: warning: comparison between signed and unsigned integer expressions reteta.cpp:17: warning: unused variable 'z' reteta.cpp:21: warning: suggest parentheses around '&&' within '||' reteta.cpp: In function 'void ing()': reteta.cpp:41: warning: comparison between signed and unsigned integer expressions reteta.cpp:50: warning: suggest parentheses around '&&' within '||' reteta.cpp:51: warning: suggest parentheses around '&&' within '||' reteta.cpp:40: warning: unused variable 'al'