Compilare: main.cpp: In function 'int main()': main.cpp:29:9: warning: unused variable 't' [-Wunused-variable] int t, a, b,c ,x, y; ^ main.cpp:29:17: warning: unused variable 'c' [-Wunused-variable] int t, a, b,c ,x, y; ^ main.cpp:31:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &a, &b); ^