Compilare: main.cpp: In function 'int main()': main.cpp:13:21: warning: unused variable 'j' [-Wunused-variable] int n, p, z, i, j, x ; ^ main.cpp:14:42: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d %d\n", &n, &p, &z) ; ^ main.cpp:16:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d ", &x) ; ^