Compilare: main.cpp: In function 'int main()': main.cpp:31:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&a,&b,&n); ^ main.cpp:33:41: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&v[i].st,&v[i].dr); ^ main.cpp:52:3: warning: 'x.intervale::st' may be used uninitialized in this function [-Wmaybe-uninitialized] if(x.st<=a&&x.dr>=b){ ^~ main.cpp:52:13: warning: 'x.intervale::dr' may be used uninitialized in this function [-Wmaybe-uninitialized] if(x.st<=a&&x.dr>=b){ ~~~~~~~^~~~~~~~~