Compilare: main.cpp: In function 'void Do(int, int)': main.cpp:29:40: warning: 'col' may be used uninitialized in this function [-Wmaybe-uninitialized] if(a[j][c]>nr && a[j][c]<a[l][c] && viz[j][c]==0) {nr=a[j][c]; lin=j; col=c;} ~~~~~~^ main.cpp:29:40: warning: 'lin' may be used uninitialized in this function [-Wmaybe-uninitialized]