#include 
     
      #include 
      
       int main(){    char str = "a =3,b=4,c=-1,d*e=12";    char key[4] = {0};    char value[4] = {0};    const char *split = ",";    char *p;    p = strtok(str,split);    while(p!=NULL){        //printf("p=%s",p);        sscanf(p,"%[^=]=%s",key,value);        printf("key=%s\n",key);        printf("value=%s\n",value);        p=strtok(NULL,split);        }    return 0;}
      
     

　　分析， =两边的为key和value