Page History

#include <assert.h>
 
void set_flag(int number, int *sign_flag) {
  if (sign_flag == NULL)
    return;

  if (number >= 0) { /* account for number being 0 */
    *sign_flag = 1;
  }
  else {
    assert(number < 0);
    *sign_flag = -1;
  }
}

int is_negative(int number) {
  int sign = 0;   /* initialize as a matter of defense-in-depth */

  set_flag(number, &sign);

  return sign < 0;
}

#include <stdio.h>
#include <ctype.h>
#include <string.h>

int do_auth(void) {
  char *username;
  char *password;

  /* Get username and password from user, return -1 if invalid */
}

void report_error(const char *msg) {
  const char *error_log;
  char buffer[24];

  sprintf(buffer, "Error: %s", error_log);
  printf("%s\n", buffer);
}

int main(void) {
  if (do_auth() == -1) {
    report_error("Unable to login");
  }
  return 0;
}

#include <stdlib.h>
 
void g(double *a, size_t n) {
  a = (double *)realloc(a, (n * 2 + 1) * sizeof(double));
  if (a != NULL) {
    for (size_t i = 0; i != n * 2 + 1; ++i) {
      if (a[i] < 0) {
        a[i] = -a[i];  /* violation */
      }
    }
 
    /* ... */
    free(a);
  }
}

#include <stdlib.h>
 
void g(double *a, size_t n) {
  a = (double *)calloc(a, (n * 2 + 1) * sizeof(double));
  if (a != NULL) {
    for (size_t i = 0; i != n * 2 + 1; ++i) {
      if (a[i] < 0) {
        a[i] = -a[i]; 
      }
    }
 
    /* ... */
    free(a);
  }
}

#include <stdio.h>
 
void report_error(const char *msg) {
  const char *error_log = msg;
  char buffer[24];

  sprintf(buffer, "Error: %s", error_log);

  printf("%s\n", buffer);
}

#include <stdio.h>
 
enum {max_buffer = 24};

void report_error(const char *msg) {
  const char *error_log = msg;
  char buffer[max_buffer];

  snprintf(buffer, sizeof(buffer), "Error: %s", error_log);
  printf("%s\n", buffer);
}

#include <time.h>
#include <unistd.h>
#include <stdlib.h>
     
double cpu_time;
struct timeval tv;
unsigned long junk;

cpu_time = ((double) clock()) / CLOCKS_PER_SEC;
gettimeofday(&tv, NULL);
srandom((getpid() << 16) ^ tv.tv_sec ^ tv.tv_usec ^ junk);