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#include <string.h>

unsigned int strpos (
  const unsigned char *string,   /* string to search */
  char c);                       /* character to find */

The strpos function searches string for the first occurrence of c. The null character terminating string is included in the search.

Return Value

The strpos function returns the index of the character matching c in string or a value of -1 if no matching character was found. The index of the first character in string is 0.

See Also

strchr, strcspn, strpbrk, strrchr, strrpbrk, strrpos, strspn

#include <string.h>
#include <stdio.h> /* for printf */

void tst_strpos (void) {
  unsigned char text [] = "Search this string for blanks";
  unsigned int i;

  i = strpos (text, ' ');

  if (i == -1)
    printf ("No spaces found in %s\n", text);
    printf ("Found a space at offset %d\n", i);
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