Compilare: user.cpp: In function ‘int quick(int*, int, int)’: user.cpp:40:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:46:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(sir);i++) ^ user.cpp:50:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(sir);i++) ^ user.cpp:63:24: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(sir[i]>='0' && sir[i]<='9' || sir[i]=='-') ^ user.cpp:70:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(sir[i]>='0' && sir[i]<='9' && i<strlen(sir)) ^