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void GetMemory(char *p,int num)
{
p = (char *)malloc(sizeof(char),num);
return;
}
int main()
{
char *str = NULL;
GetMemory(&str,100);
strcpy(str,"Helllo World.");
printf(str);
return 0;
}
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£¨2£©ÄÚ´æÐ¹Â©
ûÓÐÊÍ·ÅÄڴ棬ÍüÁË¡£returnǰ¼ÓÒ»¾ä:
free(str);
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C/C++ code:
void GetMemory(char *p,int num)
{
p = (char *)malloc(sizeof(char) * num); // Õâ¶ùÓ¦¸ÃÊÇ*°É¡£
return;
}
int main()
{
char *str = NULL; // Õâ¾äÏ൱ÓÚconst char* str = NULL; str ²»¿É±ä¡£
GetMemory(str,100); //Õâ¾ästr»¹ÊÇNULL¡£
strcpy(str,"Helllo World.");
printf(str);
return 0;
}
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float x=8266.206055;
float y=7226.922363;
float z;
z=x*y;
z=59739228.000000;
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