Compilare: user.cpp: In function ‘int back(int*, int*, int, int*, FILE*)’: user.cpp:62:9: warning: variable ‘nr’ set but not used [-Wunused-but-set-variable] int nr = st[0] * 1000 + st[1] * 100 + st[2] * 10 + st[3]; ^ user.cpp: In function ‘int main()’: user.cpp:108:10: warning: variable ‘nr2’ set but not used [-Wunused-but-set-variable] int nr2 = init[0] * 1000 + init[1] * 100 + init[2] * 10 + init[3]; ^ user.cpp:100:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fisier, "%d", &t); ^ user.cpp:107:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fisier, "%d", &init[j]); ^ user.cpp:111:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fisier, "%d", &fin[j]); ^ user.cpp:114:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fisier, "%d", &n); ^ user.cpp:120:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fisier, "%d", &x); ^