Compilare: main.cpp: In function 'int main()': main.cpp:56:40: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(arc[i].inc == incep and arc[i].sf == sfarsit or arc[i].sf == incep and arc[i].inc == sfarsit) ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:23:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ main.cpp:26:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x,&y); ^