Compilare: main.cpp: In function 'void sparg(int, int, int, int)': main.cpp:26:17: warning: unused variable 'nr' [-Wunused-variable] int nr = read_nr(); ^~ main.cpp: In function 'int main()': main.cpp:60:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("compresie.in", "r", stdin); ^ main.cpp:61:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("compresie.out", "w", stdout); ^ main.cpp:62:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^