Compilare: main.cpp: In function 'int main()': main.cpp:26:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (nra == 0 && nrb == 0 || nra == 0 && nrc == 0 || nrb == 0 && nrc == 0) { ~~~~~~~~~^~~~~~~~~~~ main.cpp:26:66: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (nra == 0 && nrb == 0 || nra == 0 && nrc == 0 || nrb == 0 && nrc == 0) { ~~~~~~~~~^~~~~~~~~~~