Compilare: user.cpp: In function ‘int main()’: user.cpp:55:153: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] ok=(A[M[j-1][V[i].y-dif]]==1&&A[M[j][V[i].y-dif-1]]==1&&A[M[j-1][V[i].y+dif]]==1&&A[M[j][V[i].y+dif+1]]==1&&M[j][V[i].y-dif]==0&M[j][V[i].y+dif]==0); ^ user.cpp:60:153: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] ok=(A[M[j+1][V[i].y-dif]]==1&&A[M[j][V[i].y-dif-1]]==1&&A[M[j+1][V[i].y+dif]]==1&&A[M[j][V[i].y+dif+1]]==1&&M[j][V[i].y-dif]==0&M[j][V[i].y+dif]==0); ^ user.cpp:23:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&cer); ^ user.cpp:24:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld %lld",&x,&y); ^ user.cpp:25:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&t); ^ user.cpp:26:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&N); ^ user.cpp:28:62: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&V[i].x,&V[i].y),M[V[i].x][V[i].y]=i; ^