Compilare: main.cpp: In function 'void S(int)': main.cpp:24:10: warning: unused variable 'o' [-Wunused-variable] int j,l,o; ^ main.cpp: In function 'int main()': main.cpp:36:26: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for(a=A(),b=B();r=a%b;a=b,b=r); ^ main.cpp:33:101: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.in","r",stdin),freopen("euclid2.out","w",stdout),c=fread(p,1,M,stdin),p[c]=0,t=B(); ^ main.cpp:33:101: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]