C语言：数组操作

#include <stdio.h>
#include <cstdlib>
#include <stdlib.h>
int main()
{
    char c1[20] = "women";
    int num=10,num1=101;
    char str[100];
    itoa(num,str,16);//将num转换化16进制赋值给str 
    printf("%s\n",str);
    itoa(num1,str,2);//将num转换化2进制赋值给str 
    printf("%s\n",str);
    char s[10];
    sprintf(s, "%d", 123); //产生"123"，赋值给数组 
    printf("%s\n",s);
    sprintf(s, "%8d%8d", 123, 4567); //产生：" 123 4567" ，赋值给数组
    printf("%s\n",s);
    sprintf(s, "%-8d%8d", 123, 4567); //产生："123 4567"
    printf("%s\n",s);
    sprintf(s, "%8x", 4567); //小写16 进制，宽度占8 个位置，右对齐
    printf("%s\n",s);
    sprintf(s, "%-8X", 4568); //大写16 进制，宽度占8 个位置，左对齐
    printf("%s\n",s);
    sprintf(s, "%08X", 4567); //产生："000011D7"
    printf("%s\n",s);
    sprintf(s, "%08x", 4567); //产生："000011D7"
    printf("%s\n",s);
    sprintf(s,"%7.2f",23.35);
    printf("%s\n",s);
      sprintf(s,"%.2f",23.35);
    printf("%s\n",s);
    getchar();
}