Compilare: user.cpp: In function ‘int lee(int, int)’: user.cpp:44:24: warning: suggest parentheses around assignment used as truth value [-Wparentheses] viz[i1][j1]=m[i1][j1]=0; ^ user.cpp: In function ‘int main()’: user.cpp:105:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:111:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c",&a); ^