请教高手编写一个简单的C语言程序

编写一个C语言程序，简单。求助大家。~

#include
void main()
{
char c;
printf("please input some words:");
for(;(c=getchar())!='
';)
printf("%c
",c);

}

#include
#include

void main()
{
char str[100];
int i,upercase=0,lowercase=0,other=0;
puts("please input the string: ");
gets(str);
for (i=0;i<strlen(str);i++)
{
if ('a' < str[i] && str[i] < 'z')
lowercase++;
else if ('A' < str[i] && str[i]< 'Z')
upercase++;
else
other++;

}
printf("upercase:%d
lovercase:%d
other:%d
",upercase,lowercase,other);

}

给你写了一些情况的判断。
其它情况自己添加。

#include<stdio.h>

int strtoint(char *str, int *r){
int len,i;
int status=0;

len = 0;
while ( 1==1){
if (str[len] == 0) break;
len = len + 1;
}
if (len > 6 || len <= 0) {status = 1; return status;};
if (str[0] != '-' && (str[0] > '9' || str[0] < '0') ) {status = 2; return status;};
if (len == 6 && strncmp(str+1,"32768",5) >= 0 ) {status = 3; return status;};
if (len == 5 && strncmp(str,"32768",5) >= 0 ) {status = 3; return status;};

sscanf(str,"%d",r);
return status;
}

void main ()
{
char str[20];
int r;
int status;
scanf("%s",&str[0]);

status = strtoint(str, &r);

switch(status)
{
case 0: printf("%d",r); break;
case 3: printf("exceed -32768 or 32768\n");
default: printf("invalid\n");
};
}

---

请教高手编写一个简单的C语言程序视频