Compilare: user.cpp: In function ‘int main()’: user.cpp:16:8: warning: left operand of comma operator has no effect [-Wunused-value] nr1, nr2, nr3, nr4 = 0; ^ user.cpp:16:13: warning: right operand of comma operator has no effect [-Wunused-value] nr1, nr2, nr3, nr4 = 0; ^ user.cpp:16:24: warning: right operand of comma operator has no effect [-Wunused-value] nr1, nr2, nr3, nr4 = 0; ^ user.cpp:13:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d\n", &T); ^ user.cpp:18:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%c", &c); ^ user.cpp:45:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%c", &c); ^