字符串转整型

#include 
  
   
...
char cs[] = "123";
int num = atoi(cs);
  

分隔字符串

#include
  
   
...
char str[] = "I am student";
char *ptr;  
ptr = strtok(str, " "); 
while (ptr != NULL) {  
     print("%s",ptr);
     //输出每一个字符/字符串
     ptr = strtok(NULL, " ");  
}