Compilare: main.cpp: In function 'int main()': main.cpp:36:35: 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:37:37: 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:40:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &Q, &n, &m); ^ main.cpp:42:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^ main.cpp:44:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &ch[i][j]); ^ main.cpp:107:11: warning: 'color' may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d\n%c\n",x, y, color); ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~