Compilare: main.cpp: In function 'int main()': main.cpp:34:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("panza.in", "r", stdin); ^ main.cpp:35:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("panza.out", "w", stdout); ^ main.cpp:37:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:39:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:41:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s[i] + 1); ^ main.cpp:29:30: warning: 'wc' may be used uninitialized in this function [-Wmaybe-uninitialized] if(!ff) ++Sol, s[wl][wc] = '@'; ~~~~~~~~~~^~~~~ main.cpp:14:13: note: 'wc' was declared here int wl, wc; ^~ main.cpp:29:30: warning: 'wl' may be used uninitialized in this function [-Wmaybe-uninitialized] if(!ff) ++Sol, s[wl][wc] = '@'; ~~~~~~~~~~^~~~~ main.cpp:14:9: note: 'wl' was declared here int wl, wc; ^~