void hello() { printf("hello,world! \n"); } main() { hello(); } 调用函数输出语名。 分析是否闺年的代码： main(){    int year;    printf("input a year number\n");    scanf("%d",&year);    if ( (year % 4 == 0 && year % 100 != 0) || year % 400 == 0 )       printf( "%d is a leap year\n", year );     else        printf("%d is not a leap year\n", year );    return year;} 下边在的代码在TC 3.1中提示:Bad command or file name main(){ int a,b; printf("input two numbers\n"); scanf("%d %d",&a,&b); if(a>b)  printf(" %d is thd max \n",a); else printf(" %d is thd max \n",b);}

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