Compilare: main.cpp:11:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^ main.cpp: In function 'int main()': main.cpp:18:26: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for(a=A(),b=A();r=a%b;a=b,b=r); ^ main.cpp:18:6: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(a=A(),b=A();r=a%b;a=b,b=r); ^~~ main.cpp:19:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(j=0;b;b/=10,j++) ^~~ main.cpp:14:91: 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),fgets(q,23,stdin),t=A(); ^ main.cpp:14:91: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:14:91: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:17:27: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(q,23,stdin),i=-1; ^