C/stdio.h/rename
rename: changes the file name
//Header file: #include <stdio.h>
//Declaration: int rename(const char *oldfname, const char *newfname);
//Return: returns zero on success or nonzero on error.
#include <stdio.h>
int main(int argc, char *argv[])
{
if(rename("oldName", "newName") != 0){
printf("Rename Error");
}
return 0;
}