#include <stdio.h>

int main()
{
    char v1 = 127;
    printf("%c\n",v1);
    printf("\123\n\n"); // 转义8进制 S
    printf("\x40\n"); // 转义16进制
    printf("12345zhao\rbxiaoyu\n"); // 回到行首,并覆盖
    printf("%c",‘A‘+32); //大写转换小写加32
    int a,b;
    scanf("%dabc%d",&a,&b);
    printf("%d---%d\n",a,b);
    char buf[]="xiaomi123xiaohong";
    char buf1[7],buf2[9];
    int d;
    sscanf(buf,"%6s%d%8s",buf1,&d,buf2);                                                      
    printf("%s\n",buf1);
    printf("%d\n",d);
    printf("%s\n",buf2);
    return 0;
}

进阶学习

sscanf