function to read a string and get the length - C
I'm having issues writing a C function that reads a string from STDIN, and returns the length of said st开发者_StackOverflowring... Suggestions?
So, simply use strlen from the C standard library:
#include <string.h>
So the strlen() function is available. You just need to pass a char pointer, and it will return the string length:
size_t length = strlen( myStr );
Note that size_t is an integral type.
By the way, if you don't know about this function, you should really dig into the C library, and lear about the basic functions it provides.
#include <stdio.h>
#include <stdlib.h> // not totally necessary just for EXIT_SUCCESS
#include <string.h>
int main(int argc, char* argv[]) {
// check number of params
if (argc != 2) {
// argv[0] is name of exe
printf("usage: %s string", argv[0]);
// check length of first command line parameter
} else {
// strlen does the counting work for you
unsigned int length = strlen(argv[1]);
printf("Length is %d\n", length);
}
return EXIT_SUCCESS;
}
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