Compilare: main.cpp: In function 'int main()': main.cpp:43:13: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 43 | while (i<strlen(s)) | ~^~~~~~~~~~ main.cpp:53:21: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 53 | while (i<strlen(s) && s[i]>='0' && s[i]<='9') | ~^~~~~~~~~~