Compilare: main.cpp: In function 'int main()': main.cpp:23:22: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int i = 0; i < strlen(sir); i++) { | ~~^~~~~~~~~~~~~ main.cpp:26:22: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 26 | while( i < strlen(sir) && '0' <= sir[i] && sir[i] <= '9' ) { | ~~^~~~~~~~~~~~~ main.cpp:96:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Numar>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 96 | for(int i = 0; i < v.size(); i++) { | ~~^~~~~~~~~~ main.cpp:14:9: warning: unused variable 'aux' [-Wunused-variable] 14 | int aux, index; | ^~~ main.cpp:95:10: warning: unused variable 'operatie' [-Wunused-variable] 95 | char operatie; | ^~~~~~~~