Compilare: main.cpp: In function 'int main()': main.cpp:64:12: warning: statement has no effect [-Wunused-value] for(rez;rez>=1;--rez){ ^ main.cpp:66:14: warning: statement has no effect [-Wunused-value] for(j;j>0;--j) ^ main.cpp:32:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("startrek.in","r",stdin); ^ main.cpp:33:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("startrek.out","w",stdout); ^ main.cpp:35:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &n,&p,&q,&m); ^ main.cpp:37:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x,&y); ^