Compilare: main.cpp: In function 'int main()': main.cpp:44:13: warning: unused variable 'a' [-Wunused-variable] int a= d[x][y][0]; ^ main.cpp:45:13: warning: unused variable 'b' [-Wunused-variable] int b= d[x][y][1]; ^ main.cpp:19:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d%d%d",&N,&M,&S,&F); ^ main.cpp:32:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&c[i]); ^ main.cpp:35:51: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&v[i].first,&v[i].second); ^