Compilare: main.cpp: In function 'int main()': main.cpp:9:13: warning: unused variable 'd' [-Wunused-variable] int a,b,d; ^ main.cpp:14:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&a); ^ main.cpp:15:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &b ); ^