Compilare: user.cpp: In function ‘int main()’: user.cpp:19:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[1601]’ [-Wformat=] scanf("%s",&s); ^ user.cpp:26:27: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(s[i-1]>='a'&&s[i-1]<='z'||s[i-1]>='0'&&s[i-1]<='9'){ ^ user.cpp:35:23: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] sir[j]=NULL; ^ user.cpp:42:21: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(s[i]>='a'&&s[i]<='z'||s[i]>='A'&&s[i]<='Z'||s[i]>='0'&&s[i]<='9'){ ^ user.cpp:42:65: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(s[i]>='a'&&s[i]<='z'||s[i]>='A'&&s[i]<='Z'||s[i]>='0'&&s[i]<='9'){ ^ user.cpp:49:22: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] sir[j]=NULL; ^ user.cpp:61:35: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(s[i-1]>='a'&&s[i-1]<='z'||s[i-1]>='0'&&s[i-1]<='9'){ ^ user.cpp:70:31: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] sir[j]=NULL; ^ user.cpp:17:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dir.in","r",stdin); ^ user.cpp:18:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dir.out","w",stdout); ^ user.cpp:19:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); ^