Compilare: main.cpp: In function 'int swaap(int&, int&)': main.cpp:18:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'void solve()': main.cpp:72:43: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(a*v[i].a+b*o[j].a+c==0 && a*v[i].b+b*o[j].b+c==0 || a*v[i].a+b*o[i].b+c==0 && a*v[i].b+b*o[j].a+c==0) ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:69:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=k;i++) ^~~ main.cpp:76:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' fprintf(out,"\n%d",sol); ^~~~~~~ main.cpp: In function 'void read()': main.cpp:21:57: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d %d %d %d",&x,&y,&xg,&yg,&xp,&yp); ^ main.cpp:22:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&m); ^ main.cpp:29:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&a,&b); ^ main.cpp:44:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ main.cpp:46:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&a,&b); ^