Discussion: String Construction
Execute the code to understand the output and gain insights into string manipulation.
We'll cover the following...
Run the code
Now, it's time to execute the code and observe the output.
Press + to interact
#include <stdio.h>int main(){char filename[] = "update.txt";char name[16];int x;/* initialize the name[] buffer with dots */for( x=0; x<16; x++ )name[x] = '.';/* extract first part of the filename */x = 0;while( filename[x] != '.' ) {name[x] = filename[x];x++;}/* output result */printf("Extracted name '%.16s' from '%s'\n", name, filename);return(0);}
Understanding the output
The code extracts the first part of a filename, before the extension. But it fails:
Extracted name 'update..........' from 'update.txt'
Code output
String termination is crucial
This point is to drive home the importance of properly terminating strings you create. In the code, the first part of the filename is extracted and saved in a buffer—but without adding the \0 (null ...