Compilare: user.cpp: In function ‘int main()’: user.cpp:38:30: warning: variable ‘tt’ set but not used [-Wunused-but-set-variable] int n, m, a, b, c, i, j, tt, cont=0; ^ user.cpp:43:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d", &n, &m); ^ user.cpp:45:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d", &a, &b, &c); ^