Compilare: main.cpp: In function 'int main()': main.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(c);++j) ~^~~~~~~~~~ main.cpp:61:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(o=0;o<strlen(c);++o) ~^~~~~~~~~~ main.cpp:64:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(p=0;p<strlen(x);++p) ~^~~~~~~~~~ main.cpp:74:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(m!=strlen(c)) ~^~~~~~~~~~~