Compilare: main.c: In function 'main': main.c:15:28: warning: unused variable 'ret' [-Wunused-variable] int n, a, b, i, max = 1, ret; ^~~ main.c:15:19: warning: unused variable 'max' [-Wunused-variable] int n, a, b, i, max = 1, ret; ^~~ main.c:19:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in, "%d", &n); ^~~~~~~~~~~~~~~~~~~~~~ main.c:22:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in, "%d %d", &a, &b); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~