Compilare: user.cpp: In function ‘int main()’: user.cpp:17:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[1000001]’ [-Wformat=] fscanf(f,"%s",&sir); ^ user.cpp:28:18: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(top>0) if (s[top]!='(') top=0; ^ user.cpp:36:18: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(top>0) if (s[top]!='[') top=0; ^ user.cpp:44:18: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(top>0) if (s[top]!='{') top=0; ^ user.cpp:16:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d\n",&n); ^ user.cpp:17:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&sir); ^