Compilare: user.cpp: In function ‘int cmmdc(int, int)’: user.cpp:6:15: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while(r=a%b) ^ user.cpp: In function ‘int main()’: user.cpp:19:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&t); ^ user.cpp:22:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d%d%d",&x,&y,&z,&a,&b); ^