I know it is stupid question but it does not resolve, and I am googling but that didn't help either. I want to select the sub string from my string and then convert it to ASCII value, but it shows me an error:
int a=char(S.substr(i-1,1));
int b=S.substr(i ,1);
if (( a== 13) && (b== 10))
break;
this is my error :
pdusms.cpp:1020: error: invalid cast from type 'std::basic_string' to type 'char' int a=char(S.substr(i-1,1));
pdusms.cpp:1021: error: invalid conversion from 'const char*' to 'int' [-fpermissive] int b=S.substr(i ,1).c_str(); ^
How can i do that? how can i change the char to int (show ASCII value)
The result of substr is a string, not a character.
A one-character string is not a character.
Use indexing to get the characters.
You want
int a = S[i-1];
int b = S[i];
but if you're looking for line delimiters you shouldn't compare to ASCII values - use
if (S[i-1] == '\r' && S[i] == '\n')
which is portable.
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