Compilare: user.cpp: In function ‘int main()’: user.cpp:32:17: warning: unused variable ‘k’ [-Wunused-variable] int i, j=0, k, r, m, n; ^ user.cpp:32:20: warning: unused variable ‘r’ [-Wunused-variable] int i, j=0, k, r, m, n; ^ user.cpp:32:23: warning: unused variable ‘m’ [-Wunused-variable] int i, j=0, k, r, m, n; ^ user.cpp:32:26: warning: unused variable ‘n’ [-Wunused-variable] int i, j=0, k, r, m, n; ^ user.cpp:29:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numere6.in", "r", stdin); ^ user.cpp:30:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numere6.out", "w", stdout); ^ user.cpp:31:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^