Compilare: user.cpp: In function ‘int main()’: user.cpp:57:15: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if (jmin=n-1) ^ user.cpp:9:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%u %u", &m, &n); ^ user.cpp:12:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%u",&a[i][j]); ^