Compilare: main.cpp: In function 'int main()': main.cpp:37:16: warning: iteration 3 invokes undefined behavior [-Waggressive-loop-optimizations] S-=ex[k]; ~~~~^ main.cpp:36:18: note: within this loop for(int k=1;k<=4;k++) ~^~~ main.cpp:17:18: warning: iteration 3 invokes undefined behavior [-Waggressive-loop-optimizations] ex[i]=0; ~~~~~^~ main.cpp:16:18: note: within this loop for(int i=1;i<=4;i++) ~^~~ main.cpp:17:17: warning: array subscript is above array bounds [-Warray-bounds] ex[i]=0; ~~~~^ main.cpp:25:17: warning: array subscript is above array bounds [-Warray-bounds] ex[4]=ex[2]; ~~~~^ main.cpp:33:17: warning: array subscript is above array bounds [-Warray-bounds] ex[4]=v[i+1]; ~~~~^