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//¿âº¯ÊýʵÏÖ
char *strcat (char *dst, const char *src)
{
  char *p = dst;
  while (*p)
    p++;
  while ((*p++ = *src++))
    ;
  return dst;
}
char *strncat (char *s1, const char *s2, long unsigned int n)
{
  char *dest = s1;
  ......

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[code=C/C++]
char** t;
main()
{
    char c[1];
    char** t1;
    sprintf(c,"%d",t);
    printf("t=%s---\n",c);
    if(strcmp(c,"0")!=0)
  &nbs ......

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1.
printf("%.9lf\n",sum); 
//Êä³öСÊýµãºó9λ²»Ê¡È¥Ä©Î²¶àÓàµÄ0
2.
printf("%.10g\n",sum);
 //Êä³öСÊýµãºó9λ²»Ê¡È¥Ä©Î²¶àÓàµÄ0
3.
#include<iomanip>
cout<<setprecision(10)<<sum<<endl;
//Êä³öСÊýµãºó9λʡȥĩβ¶àÓàµÄ0
4. 
#include<iomanip>
cout.pre ......

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