Compilare: main.cpp: In function 'int main()': main.cpp:21:18: warning: unused variable 'c' [-Wunused-variable] char c[22]={0}; ^ main.cpp:23:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=2;i<=len;i++)p*=3; lens=strlen(s); ^~~ main.cpp:23:30: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(i=2;i<=len;i++)p*=3; lens=strlen(s); ^~~~