Compilare: main.cpp: In function 'bool ver(char)': main.cpp:8:13: warning: NULL used in arithmetic [-Wpointer-arith] if(c == NULL || c == ' ' || c == '\n') return 0; ^~~~ main.cpp: In function 'int main()': main.cpp:32:31: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] cuv[nr][Le[nr]] = NULL; ^~~~ main.cpp:13:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("text4.in", "r", stdin); ^ main.cpp:14:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("text4.out", "w", stdout); ^ main.cpp:16:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ main.cpp:18:35: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s, sizeof(s), stdin); ^