#include<iostream>
 int main()
 {
   
     int  month=4;
     char season;
     if (month==12||month==1||month==2)
     {season='Winter';}
     else
     if (month==3||month==4||month==5)
     {season='Spring';}  
     else
     if (month==6||month==7||month==8)
     {season='Summer';}   
     else
     if (month==9||month==10||month==11)
     {season='Autumn';}
     else printf("Bogus Month");
     printf("April is in the %c\n",season);
     return 0;
 
}
too many characters in constant
 

int main()
 {
     int  month=4;
      // char season;
     char *pSeason = NULL;
      if (month==12||month==1||month==2) {
          pSeason = "Winter";
      }
      else if (month==3||month==4||month==5) {
          pSeason = "Spring";
      }  
      else   if (month==6||month==7||month==8) {
          pSeason = "Summer";
      }   
      else if (month==9||month==10||month==11) {
          pSeason = "Autumn";
      }
      else {
          printf("Bogus Month");

          return 0;
      }
      printf("April is in the %s\n",pSeason);
      return 0;

 }

season='Winter' season 是一个字符，空间不够，而且字符串也不能这样赋值
还有用swtch case 可能会好点

char season这里错了，应该声明一个字符数组，而不是一个字符变量，与此同时printf里面不是%c,而是%s
另外像楼上说的，字符串赋值应该用双引号而不是单引号，而且只有在初始化数组的时候能用season[] = "xxxx";这样的形式，所以下面最好弄个字符指针，正确的程序可以是下边的：
#include<stdio.h>
int main()
{

     int  month=4;
     char s[20];
     char *season = s;
     if (month==12||month==1||month==2)
     {season="Winter";}
     else
     if (month==3||month==4||month==5)
     {season="Spring";}
     else
     if (month==6||month==7||month==8)
     {season="Summer";}
     else
     if (month==9||month==10||month==11)
     {season="Autumn";}
     else printf("Bogus Month");
     printf("April is in the %s\n",season);
     return 0;

}

确实，用switch更清晰一些，LZ可以试一下，我没写

啊，忘记说了，我测试的时候用的C语言，所以头文件变了，LZ注意一下啊

char *season=a;是指针引用数组吧？

嗯..设置一个字符指针指向字符数组的首位，这样在赋值的时候就可以用双引号的形式了，在非初始化的条件下时不能用双引号的形式给数组名赋值....
啊，抱歉，我好想弄错了，不用定义数组了，直接定义一个字符指针char *season;然后下面判断赋值的时候，season就会指向双引号内字符串的首地址

www.