Compilare: main.cpp:26:67: warning: multi-character character constant [-Wmultichar] 26 | while((x[i]>='A' && x[i]<='Z') || (x[i]>='1' && x[i]<='10')) | ^~~~ main.cpp:65:67: warning: multi-character character constant [-Wmultichar] 65 | while((x[i]>='a' && x[i]<='z') || (x[i]>='1' && x[i]<='10')) | ^~~~ main.cpp: In function 'int main()': main.cpp:18:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] 18 | fin>>x+1; | ~^~