没有产生输出5 .... [英] no output is generated5....
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问题描述
它正常工作并在输出文件中生成输出但是在main（）体中调用punctuatorcheck函数后它没有给出任何输出请检查它....这是代码
It is working properly and generating output in output file but after calling punctuatorcheck function in main() body it is not giving any output please check it.... Here is the code
#include<iostream>
#include<conio.h>
#include<string>
#include<fstream>
using namespace std;
/* The grammar follwed by this analyser is : you have to give a blank to differentite between two different entities, for eg
instead of writing "int c=a+b;", write it as "int c = a + b ;".
To execute this program first create an "input.txt" file where the program is written or specify the path of the file which has
to be analysed, after compiling an "output.txt" file will be created where you have stored the program.
*/
bool keycheck(string str)
{
string keyword[] ={"num","alpha","fnum","lnum","snum","string","struct","bool","true","false","for","while","repeat","void","main()","if","else","switch","default","case","break","continue","return","goto"};
int flag=0;
if(!(str[0]>='a' && str[0]<='z'))
return false;
for(int i=0;i<2;i++)
{
if(str == keyword[i])
{
flag = 1;
break;
}
}
if(flag == 1)
return true;
else
return false;
}
string opcheck(string str)
{
string AsgOperators ="=";
string MDPOperators[5] ={"*","/","^"};
string A_SOperators[4]={"+","-"};
string RelOperators[10]={">=","<=","<",">","||","!="};
string NOT="!";
string OR="$";
string AND="&";
string S_C[2]={"SRT","CRT"};
int flag1=0,flag2=0,flag=0,flag3=0,flag4=0,flag5=0,flag6=0,flag7=0;
for(int i=0;i<3;i++)
{
if(str == MDPOperators[i])
{
flag = 1;
break;
}
}
if(flag == 1)
{
return "MDP Operators";
}
else
{
for(int i=0;i<2;i++)
{
if(str == A_SOperators[i])
{
flag1 = 1;
break;
}
}
if(flag1 == 1)
{
return "A_S Operator";
}
else
{
for(int i=0;i<6;i++)
{
if(str == RelOperators[i])
{
flag2 =1;
break;
}
}
if(flag2 == 1)
return "Relational Operator";
else
{
for(int i=0;i<2;i++)
{
if(str == S_C[i])
{
flag3 =1;
break;
}
}
if(flag3 == 1)
return "S_C Operators";
else
{
if(str == "=")
{
flag4=1;
}
if(flag4 == 1)
return "Asg Operator";
else
{
if(str == "!")
{
flag5=1;
}
if(flag5 == 1)
return "NOT";
else
{
if(str == "$")
{
flag6=1;
}
if(flag6 == 1)
return "OR";
else
{
if(str == "&")
{
flag7=1;
}
if(flag7 == 1)
{
return "AND";
}
else
{
return "Error";
}
}
}
}
}
}
}
}
}
string Punctuatorcheck(string str)
{
string punctuators[]={".",",","/>","{","}","(",")","]","["};
for(int i=0; i<9;i++)
{
if(str==punctuators[i])
{
return "Punctuator";
}
}
return "Error";
}
int ischar(char c)
{
if((c>='A' && c<'Z') || (c>='a' && c<='z'))
return 1;
else
return 0;
}
int isnum(char c)
{
if(c>='0' && c<='9')
return 1;
else
return 0;
}
int isnums(string str)
{
int flag=0;
for(int i = 0;i<str.length();i++)>
{
if(!isnum(str[i]))
{
if(str[i] != '.')
{
flag=1;
break;
}
}
}
if(flag == 1)
return 0;
else
return 1;
}
int isidentifier(string str)
{
int flag =0;
for(int i=1;i<str.length();i++)>
{
if(!ischar(str[i]))
{
if(!isnum(str[i]))
{
if(str[i] != '_')
{
if(str[i] == '[')
{
i++;
for(;str[i]!= ']';)
{
if(!isnum(str[i]))
{
flag =1;
break;
}
i++;
}
}
else
{
flag = 1;
}
if(flag ==1)
break;
}
}
}
}
return flag;
}
int main()
{
ifstream ifs("input.txt");
ofstream ofs("output.txt");
int line=0,flag=0;
bool check;
string str="",strch,strline,strp;
while(!ifs.eof())
{
getline(ifs,strline);
line++;
ofs<<"---------\n";
ofs<<line<<"\n";
strline = strline + " ";
for(int j=0;j<strline.length();j++)>
{
if(strline[j] ==' ' || strline[j]=='\t')
{
if(str != "")
{
if(ischar(str[0]))
{
check = keycheck(str);
if(check)
{
ofs<<str<<"\t --> Keywords\n";
}
else
{
flag = isidentifier(str);
if(flag == 1)
{
ofs<<str<<"\t --> Error\n";
flag = 0;
}
else
{
ofs<<str<<"\t --> Identifier\n";
}
}
if(isnum(str[0]))
{
if(isnums(str))
ofs<<str<<"\t -->Number\n";
else
ofs<<str<<"\t -->Error\n";
}
else
{
strch = opcheck(str);
if(strch == "Error")
ofs<<str<<"\t -->"<<strch<<"\n";
else
{
strch = Punctuatorcheck(str);
if(strp == "Error")
ofs<<str<<"\t -->"<<strp<<"\n";
else
ofs<<str<<"\t -->"<<strp<<"\n";
}
}
str="";
}
else
{
str=str+strline[j];
}
}
}
}
}
cout<<"output file is generated : output.txt";
getch();
return 0;
}</fstream></string></conio.h></iostream>
推荐答案
;
string AND = &;
字符串S_C [ 2 ] = { SRT， CRT};
int flag1 = 0 ，flag2 = 0 ，flag = 0 ，flag3 = 0 ，flag4 = 0 ，flag5 = 0 ，flag6 = 0 ，flag7 = 0 ;
for （ int i = 0 ; i< 3; i ++）
{
if （str == MDPOperators [i]）
{
flag = 1 ;
break ;
}
}
如果（flag == 1 ）
{
return MDP运营商;
}
else
{
for （< span class =code-keyword> int i = 0 ; i< 2; i ++）
{
if （str == A_SOperators [i]）
{
flag1 = 1 ;
break ;
}
}
如果（flag1 == 1 ）
{
return A_S Operator ;
}
else
{
for （< span class =code-keyword> int i = 0 ; i< 6; i ++）
{
if （str == RelOperators [i]）
{
flag2 = 1 ;
break ;
}
}
如果（flag2 == 1 ）
return 关系运算符 ;
else
{
for （ int i = 0 ; i< 2; i ++）
{
if （str == S_C [i]）
{
flag3 = 1 ;
break ;
}
}
如果（flag3 == 1 ）
return S_C Operators ;
else
{
if （str == =）
{
flag4 = 1 ;
}
如果（flag4 == 1 ）
return Asg Operator;
else
{
if （str == ！）
{
flag5 = 1 ;
}
如果（flag5 == 1 ）
return NOT;
else
{
if （str ==
"; string AND="&"; string S_C[2]={"SRT","CRT"}; int flag1=0,flag2=0,flag=0,flag3=0,flag4=0,flag5=0,flag6=0,flag7=0; for(int i=0;i<3;i++) { if(str == MDPOperators[i]) { flag = 1; break; } } if(flag == 1) { return "MDP Operators"; } else { for(int i=0;i<2;i++) { if(str == A_SOperators[i]) { flag1 = 1; break; } } if(flag1 == 1) { return "A_S Operator"; } else { for(int i=0;i<6;i++) { if(str == RelOperators[i]) { flag2 =1; break; } } if(flag2 == 1) return "Relational Operator"; else { for(int i=0;i<2;i++) { if(str == S_C[i]) { flag3 =1; break; } } if(flag3 == 1) return "S_C Operators"; else { if(str == "=") { flag4=1; } if(flag4 == 1) return "Asg Operator"; else { if(str == "!") { flag5=1; } if(flag5 == 1) return "NOT"; else { if(str == "
）
{
flag6 = 1 ;
}
if （flag6 == 1 ）
return 或;
else
{
if （str == &）
{
flag7 = 1 ;
}
如果（flag7 == 1 ）
{
return AND;
}
其他
{
返回 错误;
}
}
}
}
}
}
}
}
}
string Punctuatorcheck（string str）
{
string punctuators [] = { 。， ，， < span class =code-string> />， {， }， （， ）， ]， [};
for （ int i = 0 ; i< 9; i ++）
{
if （str == punctuators [i]）
{
return Punctuator;
}
}
return 错误;
}
int ischar（ char c ）
{
if （（c> = ' A'&& c< ' Z'）| |（c> = ' a'&& c< = ' z'））
return 1 ;
else
return 0 < /跨度>;
}
int isnum（ char c）
{
if （c> = ' 0'&& c< = ' 9'）
< span class =code-keyword> return 1 ;
else
return 0 < /跨度>;
}
int isnums（string str）
{
int flag = 0 ;
for （ int i = 0 ; I< str.length（）;我++）>
{
if （！isnum（str [i]））
{
if （str [i]！= ' 。'）
{
flag = 1 ;
break ;
}
}
}
如果（flag == 1 ）
return 0 ;
else
return 1 < /跨度>;
}
int isidentifier（string str）
{
int flag = 0 ;
for （ int i = 1 ; I< str.length（）;我++）>
{
if （！ischar（str [i]））
{
if （！isnum（str [i]））
{
if （str [i]！= < span class =code-string>' _'）
{
if （str [i] == ' ['）
{
i ++;
for （; str [i]！= ' ]';）
{
if （！isnum（str [i]））
{
flag = 1 ;
break ;
}
i ++;
}
}
其他
{
flag = 1 ;
\t\t\t\t\t}
\t\t\t\t\tif(flag ==1)
\t\t\t\t\t\tbreak;
\t\t\t\t}
\t\t\t}
\t\t}
\t}
return flag;
}
int main()
{
\tifstream ifs(\"input.txt\");
ofstream ofs(\"output.txt\");
\tint line=0,flag=0;
\tbool check;
\tstring str=\"\",strch,strline,strp;
\twhile(!ifs.eof())
\t{
\t\tgetline(ifs,strline);
\t\tline++;
\t\tofs<<\"---------\n\";
\t\tofs<<line<<\"\n\";
\t\tstrline = strline + \" \";
\t\tfor(int j=0;j<strline.length();j++)>
\t\t{
\t\t\tif(strline[j] ==' ' || strline[j]=='\t')
\t\t\t{
\t\t\t\tif(str != \"\")
\t\t\t\t{
\t\t\t\t\tif(ischar(str[0]))
\t\t\t\t\t{
\t\t\t\t\t\tcheck = keycheck(str);
\t\t\t\t\t\tif(check)
\t\t\t\t\t\t{
\t\t\t\t\t\t\tofs<<str<<\"\t --> Keywords\n\";
\t\t\t\t\t\t}
\t\t\t\t\t\telse
\t\t\t\t\t\t{
\t\t\t\t\t\t\tflag = isidentifier(str);
\t\t\t\t\t\t\tif(flag == 1)
\t\t\t\t\t\t\t{
\t\t\t\t\t\t\t\tofs<<str<<\"\t --> Error\n\";
\t\t\t\t\t\t\t\tflag = 0;
\t\t\t\t\t\t\t}
\t\t\t\t\t\t\telse
\t\t\t\t\t\t\t{
\t\t\t\t\t\t\t\tofs<<str<<\"\t --> Identifier\n\";
\t\t\t\t\t\t\t}
\t\t\t\t\t\t}
\t\t\t\t\t\tif(isnum(str[0]))
\t\t\t\t\t\t{
\t\t\t\t\t\t\tif(isnums(str))
\t\t\t\t\t\t\t\tofs<<str<<\"\t -->Number\n\";
\t\t\t\t\t\t\telse
\t\t\t\t\t\t\t\tofs<<str<<\"\t -->Error\n\";
\t\t\t\t\t\t}
\t\t\t\t\t\telse
\t\t\t\t\t\t{
\t\t\t\t\t\t\tstrch = opcheck(str);
\t\t\t\t\t\t\tif(strch == \"Error\")
\t\t\t\t\t\t\t\tofs<<str<<\"\t -->\"<<strch<<\"\n\";
\t\t\t\t\t\t\telse
\t\t\t\t\t\t\t{
\t\t\t\t\t\t\t\tstrch = Punctuatorcheck(str);
\t\t\t\t\t\t\t\tif(strp == \"Error\")
\t\t\t\t\t\t\t\t\tofs<<str<<\"\t -->\"<<strp<<\"\n\";
\t\t\t\t\t\t\t\telse
\t\t\t\t\t\t\t\t\tofs<<str<<\"\t -->\"<<strp<<\"\n\";
\t\t\t\t\t\t\t}
\t\t\t\t\t\t}
\t\t\t\t\t\tstr=\"\";
\t\t\t\t\t}
\t\t\t\t\telse
\t\t\t\t\t{
\t\t\t\t\t\tstr=str+strline[j];
\t\t\t\t\t}
\t\t\t\t}
\t\t\t}
\t\t}
\t}
\t\t\tcout<<\"output file is generated : output.txt\";
getch（）;
return 0 ;
}</fstream></string></conio.h></iostream>
") { flag6=1; } if(flag6 == 1) return "OR"; else { if(str == "&") { flag7=1; } if(flag7 == 1) { return "AND"; } else { return "Error"; } } } } } } } } } string Punctuatorcheck(string str) { string punctuators[]={".",",","/>","{","}","(",")","]","["}; for(int i=0; i<9;i++) { if(str==punctuators[i]) { return "Punctuator"; } } return "Error"; } int ischar(char c) { if((c>='A' && c<'Z') || (c>='a' && c<='z')) return 1; else return 0; } int isnum(char c) { if(c>='0' && c<='9') return 1; else return 0; } int isnums(string str) { int flag=0; for(int i = 0;i<str.length();i++)> { if(!isnum(str[i])) { if(str[i] != '.') { flag=1; break; } } } if(flag == 1) return 0; else return 1; } int isidentifier(string str) { int flag =0; for(int i=1;i<str.length();i++)> { if(!ischar(str[i])) { if(!isnum(str[i])) { if(str[i] != '_') { if(str[i] == '[') { i++; for(;str[i]!= ']';) { if(!isnum(str[i])) { flag =1; break; } i++; } } else { flag = 1; } if(flag ==1) break; } } } } return flag; } int main() { ifstream ifs("input.txt"); ofstream ofs("output.txt"); int line=0,flag=0; bool check; string str="",strch,strline,strp; while(!ifs.eof()) { getline(ifs,strline); line++; ofs<<"---------\n"; ofs<<line<<"\n"; strline = strline + " "; for(int j=0;j<strline.length();j++)> { if(strline[j] ==' ' || strline[j]=='\t') { if(str != "") { if(ischar(str[0])) { check = keycheck(str); if(check) { ofs<<str<<"\t --> Keywords\n"; } else { flag = isidentifier(str); if(flag == 1) { ofs<<str<<"\t --> Error\n"; flag = 0; } else { ofs<<str<<"\t --> Identifier\n"; } } if(isnum(str[0])) { if(isnums(str)) ofs<<str<<"\t -->Number\n"; else ofs<<str<<"\t -->Error\n"; } else { strch = opcheck(str); if(strch == "Error") ofs<<str<<"\t -->"<<strch<<"\n"; else { strch = Punctuatorcheck(str); if(strp == "Error") ofs<<str<<"\t -->"<<strp<<"\n"; else ofs<<str<<"\t -->"<<strp<<"\n"; } } str=""; } else { str=str+strline[j]; } } } } } cout<<"output file is generated : output.txt"; getch(); return 0; }</fstream></string></conio.h></iostream>
if(str==punctuators[i])
will always fail as the two objects are not the same. If you wish to compare strings then you need to use one of the std::string functions. It would be simpler if you just use character comparisons, although you would need to do something about /> (not sure why that is in there).
will always fail as the two objects are not the same. If you wish to compare strings then you need to use one of the std::string functions. It would be simpler if you just use character comparisons, although you would need to do something about /> (not sure why that is in there).
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