Question

我在使用xCode的macbook上运行此代码，它运行完美，没有任何错误。但是，当我尝试在Red Hat Linux服务器上编译并运行确切的代码时，我在第25行遇到了分段错误。我不确定为什么这对一台机器起作用，而不是另一台机器。

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

//Count the number of times the letter appears in the string
int count_letter(char str[], char * ch) 
{
   int i, num = 0;
   for(i=0; i < strlen(str)-1; i++)
      if(str[i] == *ch)
      {


//printf("The character is %c", ch);
     num++;
      }

   return num;
}

//Get the sentence and character to search for from the user
char * get_info(char * ch) 
{
   char *str;
   //int i=0;

   printf("Enter a sentence to search: ");
   while((str[i++]=getchar())!='\n');
   str[i]='\0';
   printf("Enter a character to search for: ");

   *ch=getchar();

   return str;
}

//Get a sentence and character from the user and count the number
//of times the character is found in the sentence.
int main() 
{

   char *sentence;
   char ch;
   int num_letters;

   sentence = get_info(&ch);
   num_letters = count_letter(sentence, &ch);

   printf("%c is found %d times.\n", ch, num_letters);

   return 0;
}

谢谢

Answer 1

char *str;

您尚未在get_info()中为其分配任何内存。

首先为它分配内存。比如

str= (char *)malloc(MAX_LEN*sizeof(char)); //MAX_LEN=define yourself what you want

c - 编译器，不同的错误？

1 个答案: