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How do I use %s in C correctly? - Stack Overflow I know that %s is a string of characters, but I don't know how to use it Can anyone provide me a very basic example of how its used and how it's different from char? All the examples given below
c - What does the %*s format specifier mean? - Stack Overflow It's used to specify, in a dynamic way, what the width of the field is: The width is not specified in the format string, but as an additional integer value argument preceding the argument that has to be formatted so "indent" specifies how much space to allocate for the string that follows it in the parameter list So,
the difference between for (char c : s) and for (char c : s)? for (char c : s) This does NOT create a copy of each element in s but instead directly references and stores it in c as an alias This means that modifying c does modify s Since copying can be an expensive operation, the peformance of it is slower versus referencing (even with built in types when optimizations are not present), which avoids a copy If you want to prevent from unknowingly
Why does Cs printf format string have both %c and %s? 71 Why does C's printf format string have both %c and %s? I know that %c represents a single character and %s represents a null-terminated string of characters, but wouldn't the string representation alone be enough?
What does %s and %d mean in printf in the C language? %s and %d are conversion specifiers; they tell printf how to interpret the remaining arguments %s tells printf that the corresponding argument is to be treated as a string (in C terms, a 0-terminated sequence of char); the type of the corresponding argument must be char * %d tells printf that the corresponding argument is to be treated as an
What is the meaning of %-*. *s in a printf format string? It's interesting Let's start with a simple printf("%s", "abc") It will print the string abc printf("%8s", "abc") will print abc, including 5 leading spaces: 8 is the "field width" Think of a table of data with column widths so that data in the same column is vertically aligned The data is by default right-aligned, suitable for numbers
compilation - g++: fatal error: cannot specify -o with -c, -S or -E . . . A o file is an object file Typically there is one object file per source file When you use the compiler's -c option, it takes a single source file and compiles it into a single object file You cannot add other object files into an existing object file, so adding both o and cpp files into the same compiler line with -c is not going to work