Compilare: user.cpp: In function ‘void read()’: user.cpp:9:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%i", &inputc); ^ user.cpp:10:64: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (int i = 0; i < inputc; i++) fscanf(f, "%i", &input[i]); ^ user.cpp: In function ‘void write()’: user.cpp:38:32: warning: ‘previouspos’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (int i = previouspos + 1; i < inputc; i++) { ^