Compilare: main.cpp: In function 'int main()': main.cpp:26:11: warning: unused variable 'g' [-Wunused-variable] 26 | FILE *g=fopen("chat.out","w"); | ^ main.cpp: In function 'int verifica(int, int (*)[3], int, FILE*)': main.cpp:19:24: warning: control reaches end of non-void function [-Wreturn-type] 19 | v[a][1]=0; | ~~~~~~~^~ main.cpp: In function 'int main()': main.cpp:47:29: warning: 'x' may be used uninitialized [-Wmaybe-uninitialized] 47 | if(!verifica(x,v,n,f)) | ~~~~~~~~^~~~~~~~~ main.cpp:24:15: note: 'x' was declared here 24 | int t,n,k,x,y,yn, v[50001][3]; | ^