Compilare: main.cpp: In function 'int main()': main.cpp:22:21: warning: unused variable 'x' [-Wunused-variable] int x1,y1,x2,y2,x; ^ main.cpp:46:11: warning: unused variable 'cnt' [-Wunused-variable] int g,cnt = 0; ^~~ main.cpp:20:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&n,&m); ^ main.cpp:25:49: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d %d",&x1,&y1,&x2,&y2); ^ main.cpp:45:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&q); ^ main.cpp:49:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&g); ^