Compilare: main.cpp: In function 'void solve()': main.cpp:95:144: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if((a*v[i].p1+b*v2[j].p1+c==0 && a*v[i].p2+b*v2[j].p2+c==0) ||(a*v[i].p1+b*v2[j].p2+c==0 && a*v[i].p2+b*v2[j].p1+c==0) && fr[i]==0 && fr2[j]==0) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:24:62: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d %d %d %d %d",&m,&n,&x1,&y1,&x2,&y2,&p); ^ main.cpp:34:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&x1,&x2); ^ main.cpp:56:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&p); ^ main.cpp:59:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&y1,&y2); ^