Compilare: main.cpp: In function 'int process(char*, char*, int, int)': main.cpp:26:33: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | if(!already[s1[k]] && s1[k] < 127 && s1[k] > 32){ | ~~~~^ main.cpp:27:33: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | already[s1[k]] = true; | ~~~~^ main.cpp:33:28: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | if(already[s1[k]] && s1[k] < 127 && s1[k] > 32){ | ~~~~^ main.cpp: In function 'void in()': main.cpp:51:9: warning: 'secondLine' is used uninitialized [-Wuninitialized] 51 | if(secondLine){ | ^~ main.cpp:48:10: note: 'secondLine' was declared here 48 | bool secondLine; | ^~~~~~~~~~