Compilare: main.cpp: In function 'void task2()': main.cpp:76:8: warning: unused variable 'area_index' [-Wunused-variable] int area_index = b[i][j]; ^~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:17:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &v, &n, &m); ^ main.cpp:19:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", a[i] + 1); ^ main.cpp: In function 'int main()': main.cpp:113:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.in", "r", stdin); ^ main.cpp:114:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.out", "w", stdout); ^ main.cpp: In function 'void task2()': main.cpp:109:8: warning: 'max_area_color' may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d\n%c\n", max_area_i, max_area_j, max_area_color); ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~