Compilare: user.cpp: In function ‘int main()’: user.cpp:42:18: warning: unused variable ‘x’ [-Wunused-variable] int n, m, i, x, y, z, a, k, last, aux, ans; ^ user.cpp:42:21: warning: unused variable ‘y’ [-Wunused-variable] int n, m, i, x, y, z, a, k, last, aux, ans; ^ user.cpp:42:24: warning: unused variable ‘z’ [-Wunused-variable] int n, m, i, x, y, z, a, k, last, aux, ans; ^ user.cpp:42:27: warning: unused variable ‘a’ [-Wunused-variable] int n, m, i, x, y, z, a, k, last, aux, ans; ^ user.cpp:42:33: warning: unused variable ‘last’ [-Wunused-variable] int n, m, i, x, y, z, a, k, last, aux, ans; ^ user.cpp:42:39: warning: unused variable ‘aux’ [-Wunused-variable] int n, m, i, x, y, z, a, k, last, aux, ans; ^ user.cpp:42:44: warning: unused variable ‘ans’ [-Wunused-variable] int n, m, i, x, y, z, a, k, last, aux, ans; ^ user.cpp:46:32: 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:48:57: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &e[i].x, &e[i].y, &e[i].z); ^ user.cpp:63:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &k); ^