用c语言编写一个程序，从键盘上输入两个字符给字符变量a，b，并输出变量a，b的值。 编写一个程序，通过指针变量将一个字符数组中的字符倒序输出
\u7f16\u5199C\u8bed\u8a00\u7a0b\u5e8f\uff1a\u4ece\u952e\u76d8\u4e0a\u8f93\u5165\u4e24\u4e2a\u6574\u578b\u6570\u636e,\u5206\u522b\u5b58\u653e\u5728\u6574\u578b\u53d8\u91cfa \u548cb \u4e2d, \u7136\u540e\u8f93\u51fa\u8868\u8fbe\u5f0fa/b \u548c a%b \u7684\u503c.#include
int main()
{
int a,b;
scanf("%d %d", &a,&b );
printf("%d/%d=%d\n", a,b,a/b );
printf("%d%%%d=%d\n", a,b,a%b );
return 0;
}
\u4f60\u72af\u4e86\u4e24\u4e2a\u9519\u8bef.
1.b\u7684\u751f\u547d\u5468\u671f\u53ea\u662foutput\u51fd\u6570,\u5f53\u8fd0\u884c\u5230printf\u7684\u65f6\u5019,b\u7684\u5185\u5b58\u5df2\u7ecf\u88ab\u7cfb\u7edf\u56de\u6536\u4e86,\u6240\u4ee5p\u6307\u5411\u5730\u7684\u4e00\u5757\u65e0\u6548\u7684\u5185\u5b58.
2.b\u5e94\u8be5\u88ab\u521d\u59cb\u5316.\u7533\u8bf7b\u7684\u65f6\u5019,\u5b83\u91cc\u9762\u7684\u5185\u5bb9\u4e0d\u786e\u5b9a,\u800cprintf\u4f1a\u9010\u4e2a\u8f93\u51fa\u5b57\u7b26\u76f4\u5230\u9047\u5230\u7ed3\u675f\u7b26'\0'.
\u6211\u4fee\u6539\u540e\u662f\u8fd9\u6837\u7684.
#include "stdio.h"
#include "string.h"
char *output(char name[]);
main()
{
char name[20];
scanf("%s",name);
printf("%s\n",output(name));
}
char *output(char name[])
{
int i,n;
char *p;
char *b = new char[20];//\u628ab\u7684\u5185\u5b58\u653e\u5230\u5806\u4e0a\u53bb,\u5b83\u7684\u751f\u547d\u5468\u671f\u5c31\u5168\u5c40\u4e86.
memset(b, 0, 20);//\u521d\u59cb\u5316.
n=strlen(name);
for(i=0;i<n;i++)
b[i]=name[n-1-i];
p=b;
return p;
}
#include <stdio.h> //编译预处理命令
int main(int argc, char *argv[]) //主函数，字符的声明
{
char a,b; //定义字符a，b
scanf("%c %c",&a,&b); //输入字符a，b
printf("%c %c\n",a,b);//打印字符a，b
return 0; //返回并且输出a，b
}
扩展知识：
Matlab变量的特点：不需事先声明，也不需指定变量类型，Matlab自动根据所赋予变量的值或对变量所进行的操作来确定变量的类型；在赋值过程中，如果变量已经存在，Matlab会用新值代替旧值，并以新的变量类型代替旧的变量类型。
变量的默认类型为double。
#include <stdio.h>
int main()
{
char a,b;
a=getchar();
scanf("%c", &b );
printf("a=%c\n", a );
printf("b=%c\n", b );
return 0;
}
#include <stdio.h>
int main()
{
int i;
double d ;
char c;
printf("input char :" );
c=getchar();
putchar(c);
printf("input integer :" );
scanf("%d", &i );
printf("i=%10d\n", i );
printf("input float:" );
scanf("%lf", &d );
printf("d=%.2lf\n", d );
return 0;
}
1、
#include <stdio.h>
int main(int argc, char *argv[])
{
char a,b;
scanf("%c %c",&a,&b);
printf("%c %c\n",a,b);
return 0;
}
2、
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int a;
double b;
char c;
scanf("%d %lf",&a,&b);
getchar();
c=getchar();
printf("%10d %.2lf\n",a,b);
putchar(c);
return 0;
}
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