字符常量
#include <stdio.h>
int main()
{
char c1,c2;
c1='a';
c2='b';
printf("%c %c\n", c1, c2);
return 0;
}
字符当数字用?!
#include <stdio.h>
int main()
{
char c1,c2;
int i = 100;
c1 = 'a';
i = i - c1;
printf("c1: %c\n", c1);
printf("c1: %d, i: %d\n", c1, i);
c2 = c1 + 4;
printf("c2: %c\n", c2);
return 0;
}
字符进行数值运算——ASCII是本质
#include <stdio.h>
int main()
{
int i,j;
i='A';
j='B';
printf("%d %d\n", i, j);
printf("i+j=%d\n", i+j);
char c1, c2;
c1 = 97;
c2 = 98;
printf("%c %c\n", c1, c2);
printf("%c %d\n", c1-32, c2-32);
return 0;
}
获得缓存区中的输入数据（运行时，分别输入abc<回车>和a<回车>查看结果）
#include <stdio.h>
int main()
{
char c1,c2;
c1=getchar();
c2=getchar();
printf("%c %c\n", c1, c2);
printf("%d %d\n", c1, c2);
return 0;
}
转义字符用法示例
#include <stdio.h>
int main()
{
printf("%.4f%.4f%.4f\n", 1.01, 2.2334, 3.4);
printf("col1\tcol2\tcol3\n");
printf("%.4f\t%.4f\t%.4f\n",1.01, 2.2334, 3.4);
printf("This\nis\na\n\t\ttest\n\nShe said, \"How are you?\"\n");
return 0;
}
趣味转义字符
#include <stdio.h>
int main()
{
printf("笑脸：\001\n");
printf("红黑桃：\003 \006\n");
printf("听个响：\a\n");
printf("换几行：a\012 b\n c\x0A d\n");
printf("看字母：AB\n");
printf("再看字母：\101\102\n");
printf("再看字母：\101\b\102\n");
printf("还看字母：\101\r\102\n");
return 0;
}
