Compilare: main.cpp: In function 'int main()': main.cpp:10:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("joctv.in", "rt", stdin); ^ main.cpp:11:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("joctv.out", "wt", stdout); ^ main.cpp:14:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d", &N), i=1; i<=N; ++i) ^ main.cpp:15:66: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(j=1; j<=N; ++j) scanf("%d", &A[i][j]), A[i][j] += A[i-1][j]; ^