C语言输入小写输出大写

#include 
#include 

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	char zifu;                                       //声明字符 
	printf("输入字符：");                             //提示输入字符 
	zifu=getchar();                                 //读取输入字符 
	printf("输入字符是%c,%d\n",zifu,zifu);          //输出字符 
	zifu-=32;                                        //字符自减32 
	printf("它的大写字符是%c,%d",zifu,zifu);         //输出新字符 
	return 0;
}