atoi和itoa

 1 #include "stdio.h"  
 2 
 3 #include "stdlib.h"  
 4 
 5   
 6 
 7 int main(void)  
 8 
 9 {  
10 
11     int num = 10;  
12 
13     char str[100];  
14 
15     itoa(num, str, 8);      //将整数10转换为八进制保存在str字符数组中  
16 
17     printf("%s\n", str);  
18 
19     system("pause");  
20 
21     return 0;  
22 
23 }  

 1 #include "stdio.h"  
 2 
 3 #include "stdlib.h"  
 4 
 5   
 6 
 7 int main(void)  
 8 
 9 {  
10 
11     int num = 15;  
12 
13     char str[100];  
14 
15     int n = atoi(itoa(num, str, 2));   //先把num转换为二进制的字符串，再把该字符串转换为整数  
16 
17     printf("%d\n",n);  
18 
19     system("pause");  
20 
21     return 0;  
22 }