Compilare: user.cpp: In function ‘int tr_josi(int, int, int, int)’: user.cpp:28:9: warning: unused variable ‘nr’ [-Wunused-variable] int nr = i2-i+1; ^ user.cpp: In function ‘int tr_susi(int, int, int, int)’: user.cpp:48:9: warning: unused variable ‘nr’ [-Wunused-variable] int nr = i2-i+1; ^ user.cpp: In function ‘int main()’: user.cpp:88:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elicop.in", "r", stdin); ^ user.cpp:89:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elicop.out", "w", stdout); ^ user.cpp:90:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:94:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^ user.cpp:97:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v); ^ user.cpp:102:59: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d", &is, &js, &ifi, &jf, &ssj); ^