Compilare: main.cpp: In function 'int main()': main.cpp:21:18: warning: operation on 'i' may be undefined [-Wsequence-point] for(i=1;i<=x;i=i++) ~^~~~ main.cpp:11:40: warning: 'max4' may be used uninitialized in this function [-Wmaybe-uninitialized] int sum=0,i,j,x,y,e,max1,max2,max3,max4,max5,r; ^~~~ main.cpp:49:21: warning: 'max3' may be used uninitialized in this function [-Wmaybe-uninitialized] max3=max3+a[i][e]; ~~~~^~~~~~~~~~~~~ main.cpp:11:30: warning: 'max2' may be used uninitialized in this function [-Wmaybe-uninitialized] int sum=0,i,j,x,y,e,max1,max2,max3,max4,max5,r; ^~~~ main.cpp:28:21: warning: 'max1' may be used uninitialized in this function [-Wmaybe-uninitialized] max1=max1+a[i][e]; ~~~~^~~~~~~~~~~~~