程序代码：

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
int row;
int spc,spcrow;
int lchs,lchs2;
int rchs,rchs2;
int var;
char chars;

scanf("%c",&chars);
for(row=1,lchs2=1,rchs2=0,spcrow=4;row<=5;row++,spcrow--,lchs2++,rchs2++)
{
    
    //空格for
    for(spc=1;spc<=spcrow;spc++)
        printf(" ");


   //左字符for
    for(lchs=1,var=4;lchs<=lchs2;lchs++,var--)
        printf("%c",chars-var);
        var+=2;

  //右字符for

    for(rchs=1;rchs<=rchs2;rchs++,var++)
        printf("%c",chars-var);
        printf("\n");
}
system("pause");
return 0;
}