Compilare: main.cpp: In function 'int main()': main.cpp:95:48: warning: self-comparison always evaluates to true [-Wtautological-compare] if(f[i+vi[v1]][j+vj[v]]==f[i+vi[v1]][j+vj[v]] && f[i+vi[v1]][j+vj[v]]!=f[i][j]) ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:34:35: 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:35:37: 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:36:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%d %d\n",&cer,&n, &m); ^ main.cpp:41:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&f[i][j]); ^ main.cpp:44:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^