Compilare: user.cpp: In function ‘void init0()’: user.cpp:23:23: warning: suggest parentheses around assignment used as truth value [-Wparentheses] viz[i][j] = a[i][j] = 0; ^ user.cpp: In function ‘void readFile()’: user.cpp:32:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &p); ^ user.cpp:33:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &m); ^ user.cpp:41:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &a[i][j]); ^