Compilare: main.cpp: In function 'int fact()': main.cpp:21:19: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 21 | else while(poz<strlen(s) &&(s[poz]>='0' && s[poz]<='9')) | ~~~^~~~~~~~~~ main.cpp: In function 'int mult()': main.cpp:31:14: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 31 | while(poz<strlen(s) && (s[poz]=='*' || s[poz]=='/')) | ~~~^~~~~~~~~~