Learn point C language (one): Goto statement

Source: Internet
Author: User
Tags goto include printf

Example 1:

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

int main(void)
{
  char str[256];

  scanf("%s", str);

  if (strlen(str) < 10) {
    goto Label1;
  } else {
    goto Label2;
  }

  Label1:
    printf("\n输入内容没有超过10个字符");
    goto Label3;
  Label2:
    printf("\n输入内容达到或超过了10个字符");
    goto Label3;

  Label3: getchar(); getchar(); return 0;
}

Example 2:

#include <stdio.h>

int main(void)
{
  int i = 0;
  while (1) {
    i++;
    printf("%d\n", i);
    if (i == 10) goto AAA;
  }

  AAA: printf("OK!\n");
  getchar();
  return 0;
}

Example 3:goto an empty statement

#include <stdio.h>

int main(void)
{
  int i = 0;
  for (;;) {
    i++;
    printf("%d\n", i);
    if (i == 10) goto AAA;
  }

  AAA:;  /* 这是个空语句 */
  getchar();
  return 0;
}

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