Compilare: user.cpp: In function ‘void caz3(int)’: user.cpp:54:23: warning: unused variable ‘a’ [-Wunused-variable] int nod1=nod,ok=1,a=0; ^ user.cpp: In function ‘int main()’: user.cpp:96:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("puzzle2.in", "r", stdin); ^ user.cpp:97:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("puzzle2.out", "w", stdout); ^ user.cpp:99:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:102:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp: In function ‘void caz2(int)’: user.cpp:32:19: warning: ‘nod1’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol[2][1]=nod1; ^