Compilare: user.cpp: In function ‘int cmmmc(int, int)’: user.cpp:9:15: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while(r=a%b){ ^ user.cpp: In function ‘int main()’: user.cpp:25:18: warning: unused variable ‘val’ [-Wunused-variable] int i, cm=1, val, x, val1; ^ user.cpp:25:26: warning: unused variable ‘val1’ [-Wunused-variable] int i, cm=1, val, x, val1; ^