Compilare: user.cpp: In function ‘int main()’: user.cpp:41:15: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for(i=m;j=n;i){ ^ user.cpp:41:17: warning: for increment expression has no effect [-Wunused-value] for(i=m;j=n;i){ ^ user.cpp:12:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &m, &n); ^