I am trying to replace a certain character in a string with a space using the following code line:
str[i] = " ";
How can realize this without getting the error in the title of the question?
use single quotes
str[ i ] = ' ';
In C++, the token " " is a string literal which represents an array of two characters: the value of a space in the character set (eg, the value 32 in ascii) and a zero. On the other hand, the token ' ' represents a single character with the value of a space (usually 32). Note that in C, the token ' ' represents an integer with the value of a space. (In C, sizeof( ' ' ) == sizeof( int ), while in C++, sizeof( ' ' ) == 1.)
Single char
literals are obtained with single quotes:
str[i] = ' ';
A literal with double-quotes is a full string literal (a null-terminated array of char
), but you're only replacing a single char
.
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