void * 应用实例

void swap(void *a, void *b, size_t size) { void* temp = malloc(size);  memcpy(temp, b,    size);  memcpy(b,    a,    size);  memcpy(a,    temp, size);}int main(){     double ai=327670;     double bi=7670;     swap(&ai, &bi, sizeof(double ));cout<<ai<<" "<<bi;return 0;}

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