Compilare: main.cpp: In function 'int main()': main.cpp:43:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<strlen(txt); j++) ~^~~~~~~~~~~~ main.cpp:36:9: warning: unused variable 'k' [-Wunused-variable] int k=0,p=0,dis=0,minim=INT_MAX; ^ main.cpp:36:13: warning: unused variable 'p' [-Wunused-variable] int k=0,p=0,dis=0,minim=INT_MAX; ^ main.cpp:36:17: warning: unused variable 'dis' [-Wunused-variable] int k=0,p=0,dis=0,minim=INT_MAX; ^~~