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#include<stdio.h>
#include<stdlib.h>
#define BUFFERSIZE 1024
int main()
{
unsigned int a,b,sum;
char buffer[BUFFERSIZE];
printf("*************************************\n");
printf("* Welcome to use our counter *\n");
printf("* Input two integers in on line *\n");
printf("* The sum will be printe *\n");
printf("* Input the char '#' to quit *\n");
printf("*************************************\n");
while(fgets(buffer,BUFFERSIZE,stdin)!=NULL)&&(buffer[0]!='#'); /* while(A),表达试A要用括号 */
{
if(sscanf(buffer,"%d%d",&a,&b)!=2)
{
printf("the input is skipped:%s",buffer);
continue; /* continue 只用与循环语句中，用来退出本次循环，不能用在if句中 */
}
sum=a+b;
printf("The sum of%dand%dis%d\n",a,b,sum);
}
return 0;
}






改成下面样子：
#include<stdio.h>
#include<stdlib.h>
#define BUFFERSIZE 1024
int main()
{
unsigned int a,b,sum;
char buffer[BUFFERSIZE];
printf("*************************************\n");
printf("* Welcome to use our counter *\n");
printf("* Input two integers in on line *\n");
printf("* The sum will be printe *\n");
printf("* Input the char '#' to quit *\n");
printf("*************************************\n");
while((fgets(buffer,BUFFERSIZE,stdin)!=NULL)&&(buffer[0]!='#'));
{
if(sscanf(buffer,"%d%d",&a,&b)!=2)
{
printf("the input is skipped:%s",buffer);
goto loop;
}
sum=a+b;
printf("The sum of%dand%dis%d\n",a,b,sum);
loop:;
}
return 0;
}

[此贴子已经被作者于2007-7-16 9:57:33编辑过]