typedef struct { char s[20]; int i; float f; } S; S *s=(S*)malloc(sizeof(S)); Sendto(sockfd, s, sizeof(S), 0, pservaddr, servlen);
Recvfrom(sockfd, s, sizeof(S), 0, pcliaddr, &len); printf("receive:%lf,%d,%s\n",s->f,s->i,s->s);
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