Compilare: user.cpp: In function ‘void ciur()’: user.cpp:8:9: warning: unused variable ‘f’ [-Wunused-variable] int f, i, j, i1, j1; ^ user.cpp:8:22: warning: unused variable ‘j1’ [-Wunused-variable] int f, i, j, i1, j1; ^ user.cpp: In function ‘int main()’: user.cpp:37:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("intersectii.in", "r", stdin); ^ user.cpp:38:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("intersectii.out", "w", stdout); ^ user.cpp:40:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &k); ^ user.cpp:60:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a); ^