Compilare: main.cpp: In function 'void upd_val(item*&)': main.cpp:30:14: warning: unused variable 'ok' [-Wunused-variable] bool ok = 0; ^~ main.cpp: In function 'int main()': main.cpp:120:28: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'bool*' [-Wformat=] scanf("%d%d\n", &n, &ok); ^ main.cpp:126:22: warning: unused variable 'ok' [-Wunused-variable] bool ok = 0; ^~ main.cpp: In function 'int acces(item*&, int, int)': main.cpp:86:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:111:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv8.in", "r", stdin); ^ main.cpp:112:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv8.out", "w", stdout); ^ main.cpp:120:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &n, &ok); ^ main.cpp:122:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &c); ^ main.cpp:124:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &y, &x); ^ main.cpp:132:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &x); ^ main.cpp:136:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &x, &y); ^ main.cpp:140:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &x, &y); ^