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Removing spaces and puctuation from a string

#include <stdio.h> #include <ctype.h> int main() {    char buffer[80] = "This is a test";    char *pbuffer1 = buffer;    char *pbuffer2 = buffer;    pbuffer1 = buffer;              /* Reset pointer to start           */    while(*pbuffer1 != '\0')    {      if(ispunct(*pbuffer1) || isspace(*pbuffer1))      {        ++pbuffer1;        continue;      }      else        *pbuffer2++ = *pbuffer1++;  /* otherwise, copy the character */    }    *pbuffer2 = '\0';               /* Append string terminator      */    printf("\n%s\n", buffer); }