Compilare: main.cpp: In function 'int main()': main.cpp:32:30: warning: left operand of comma operator has no effect [-Wunused-value] for(int i=n,x=1;i>0,x<=n;i--,x++) ~^~ main.cpp:38:26: warning: left operand of comma operator has no effect [-Wunused-value] for(int i=n,x=1;i>0,x<=n && ok && fin==0;i--,x++) ~^~ main.cpp:40:30: warning: left operand of comma operator has no effect [-Wunused-value] for(int j=n,y=1;j>0,y<=n;j--,y++) ~^~ main.cpp:46:26: warning: left operand of comma operator has no effect [-Wunused-value] for(int j=n,x=1;j>0,x<=n && ok && fin==0;j--,x++) ~^~