Compilare: user.cpp: In function ‘void numere()’: user.cpp:32:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0 ; i < strlen(s); i++) ^ user.cpp: In function ‘void prelucrare()’: user.cpp:60:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < strlen(s); i++) ^ user.cpp:80:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < strlen(s); i++) ^ user.cpp:141:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < strlen(s); i++) ^ user.cpp:166:44: warning: unused variable ‘sum’ [-Wunused-variable] long long sum; ^ user.cpp:193:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < strlen(s); i++) ^ user.cpp:219:44: warning: unused variable ‘sum’ [-Wunused-variable] long long sum; ^