大小写字母的转换

#include <stdio.h>#include <stdlib.h>/* run this program using the console pauser or add your own getch, system("pause") or input loop */int main(int argc, char *argv[]) {char zifu1,zifu2;                                  //声明字符1，2 zifu1=97;                                          //定义字符1 zifu2=98;                                          //定义字符2 printf("字符1是%c，字符2是%c\n",zifu1,zifu2);      //输出字符1，字符2字符型 zifu1-=32;                                         //将字符1ASCLL码-32zifu2-=32;                                        //将字符2ASCLL码 -32 printf("字符1是%c，字符2是%c",zifu1,zifu2);       //输出字符1，2字符型 return 0;}