Compilare: main.cpp: In function 'int main()': main.cpp:5:18: warning: this 'for' clause does not guard... [-Wmisleading-indentation] #define F(i,b,n) for(i=b;i<=n;i++) ^ main.cpp:24:3: note: in expansion of macro 'F' F(i,1,3)g<<c[i]<<' ';g<<k-6;return 0; ^ main.cpp:24:24: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' F(i,1,3)g<<c[i]<<' ';g<<k-6;return 0; ^ main.cpp:19:19: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] for(k=6;;++k)FF if(M[i][j]==k)F(d,0,3) ^