Compilare: user.cpp: In function ‘int main()’: user.cpp:15:30: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘char*’ [-Wformat=] fscanf(fi,"%d", &v[i]); ^ user.cpp:13:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &m); ^ user.cpp:15:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &v[i]); ^ user.cpp:79:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &x); ^ user.cpp:20:9: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int x1, y1, x2, y2; ^ user.cpp:38:17: warning: ‘y1’ may be used uninitialized in this function [-Wmaybe-uninitialized] y1++; ^ user.cpp:20:17: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] int x1, y1, x2, y2; ^