Compilare: user.cpp: In function ‘int main()’: user.cpp:4:46: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("stirling.in", "r", stdin);freopen("stirling.out", "w", stdout);scanf("%d", &p);generare();for(int i = 0; i < p; i++){scanf("%d %d %d", &x, &n, &m);if(x == 1){printf("%d\n", sol1[n][m]);}else if(x == 2){printf("%d\n", sol2[n][m]);}}return 0;} ^ user.cpp:4:83: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("stirling.in", "r", stdin);freopen("stirling.out", "w", stdout);scanf("%d", &p);generare();for(int i = 0; i < p; i++){scanf("%d %d %d", &x, &n, &m);if(x == 1){printf("%d\n", sol1[n][m]);}else if(x == 2){printf("%d\n", sol2[n][m]);}}return 0;} ^ user.cpp:4:99: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("stirling.in", "r", stdin);freopen("stirling.out", "w", stdout);scanf("%d", &p);generare();for(int i = 0; i < p; i++){scanf("%d %d %d", &x, &n, &m);if(x == 1){printf("%d\n", sol1[n][m]);}else if(x == 2){printf("%d\n", sol2[n][m]);}}return 0;} ^ user.cpp:4:167: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("stirling.in", "r", stdin);freopen("stirling.out", "w", stdout);scanf("%d", &p);generare();for(int i = 0; i < p; i++){scanf("%d %d %d", &x, &n, &m);if(x == 1){printf("%d\n", sol1[n][m]);}else if(x == 2){printf("%d\n", sol2[n][m]);}}return 0;} ^