Compilare: user.cpp: In function ‘int main()’: user.cpp:10:9: warning: unused variable ‘m’ [-Wunused-variable] int n, m, x, i, j,ok,inversari=0; ^ user.cpp:10:12: warning: unused variable ‘x’ [-Wunused-variable] int n, m, x, i, j,ok,inversari=0; ^ user.cpp:10:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, x, i, j,ok,inversari=0; ^ user.cpp:10:20: warning: unused variable ‘ok’ [-Wunused-variable] int n, m, x, i, j,ok,inversari=0; ^ user.cpp:11:9: warning: variable ‘stiva’ set but not used [-Wunused-but-set-variable] char c,stiva[5000]; ^ user.cpp:13:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:14:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%c", &c); ^ user.cpp:19:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%c", &c); ^