Compilare: user.cpp: In function ‘void mare(int)’: user.cpp:18:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(eq==1) ^ user.cpp:16:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok=1; ^ user.cpp: In function ‘int main()’: user.cpp:81:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(c1);++i) ^