Compilare: main.cpp: In function 'int main()': main.cpp:66:15: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(y2!=0) if(sumlin[x1]!=sumcol[y1]) swap(y1,y2); ^ main.cpp:82:38: warning: 'y2' may be used uninitialized in this function [-Wmaybe-uninitialized] rasp1=magic_sum-sumcol[y1]+a[x1][y1]; ~~~~~~~~~^ main.cpp:66:47: warning: 'y1' may be used uninitialized in this function [-Wmaybe-uninitialized] if(y2!=0) if(sumlin[x1]!=sumcol[y1]) swap(y1,y2); ~~~~~~~~~^ main.cpp:82:48: warning: 'x2' may be used uninitialized in this function [-Wmaybe-uninitialized] rasp1=magic_sum-sumcol[y1]+a[x1][y1]; ~~~~~~~~^ main.cpp:77:48: warning: 'x1' may be used uninitialized in this function [-Wmaybe-uninitialized] rasp1=magic_sum-sumlin[x1]+a[x1][y1]; ~~~~~~~~^