Compilare: main.cpp: In function 'int main()': main.cpp:22:27: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 22 | for (int i = 0; i < strlen(s); i ++) | ~~^~~~~~~~~~~ main.cpp:23:20: warning: array subscript has type 'char' [-Wchar-subscripts] 23 | fr1[s[i]] ++; | ~~~^ main.cpp:24:27: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int i = 0; i < strlen(t); i ++) | ~~^~~~~~~~~~~ main.cpp:25:20: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | fr2[t[i]] ++; | ~~~^