Compilare: user.cpp: In function ‘unsigned int Expresie()’: user.cpp:56:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<n&&expr[i]==',') ^ user.cpp: In function ‘unsigned int Mediana(VI&)’: user.cpp:62:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==n||expr[i]==']') ^ user.cpp:96:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i<n&&expr[i]>='0'&&expr[i]<='9';++i ) ^ user.cpp: In function ‘unsigned int Suma()’: user.cpp:103:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==n) ^ user.cpp: In function ‘unsigned int Secventa(VI&)’: user.cpp:151:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==n||expr[i]==')') ^