Compilare: user.cpp: In function ‘int cond(str, str)’: user.cpp:10:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if(a.x==b.x) return a.y<b.y; ^~ user.cpp:11:18: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ return a.x<b.x; ^~~~~~ user.cpp: In function ‘int main()’: user.cpp:19:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &k); ^ user.cpp:20:61: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n;i++) fscanf(fin, "%d %d", &p[i].x, &p[i].y); ^