Compilare: user.cpp: In function ‘int main()’: user.cpp:25:16: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if (c=1) ^ user.cpp:32:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(c=1) ^ user.cpp:9:9: warning: unused variable ‘n’ [-Wunused-variable] int n,i,s1,nr,c; ^ user.cpp:9:11: warning: unused variable ‘i’ [-Wunused-variable] int n,i,s1,nr,c; ^ user.cpp:21:16: warning: ‘s1’ may be used uninitialized in this function [-Wmaybe-uninitialized] s1=s1+1; ^