Compilare: main.cpp: In function 'int calc(int)': main.cpp:13:25: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i=poz; i<strlen(s); ++i) | ~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:39: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 62 | while(isdigit(s[i])&&i<strlen(s)) | ~^~~~~~~~~~ main.cpp: In function 'int calc(int)': main.cpp:49:14: warning: 'last' may be used uninitialized [-Wmaybe-uninitialized] 49 | else if(last=='M') | ^~ main.cpp:12:14: note: 'last' was declared here 12 | char last; | ^~~~