Compilare: user.cpp: In function ‘int main()’: user.cpp:49:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(v[a][b]& dr ==0)nr++; ^ user.cpp:50:21: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(v[a][b]& sus ==0)nr++; ^ user.cpp:51:21: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(v[a][b]& jos ==0)nr++; ^ user.cpp:52:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(v[a][b]& st ==0)nr++; ^ user.cpp:12:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("verlab.in","r",stdin); ^ user.cpp:13:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("verlab.out","w",stdout); ^ user.cpp:14:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:18:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&r,&c); ^ user.cpp:23:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] {scanf("%d",&v[j1][j2]); ^