Compilare: main.cpp: In function 'bool substring(int, int)': main.cpp:15:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<=strlen(S[y])-strlen(S[x]) ;i++) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void rezolvare1()': main.cpp:33:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(S[i])>maxx) ~~~~~~~~~~~~^~~~~ main.cpp:39:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(S[i])==maxx) ~~~~~~~~~~~~^~~~~~ main.cpp:41:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<strlen(S[i]); j++) ~^~~~~~~~~~~~~