问程序在scanf()函数后卡住

EN

#include <stdio.h>
#include <stdlib.h>

struct father{
    char dad_name[50];
    int dad_age;
};
struct mother{
    char mom_name[50];
    int mom_age;
};
struct baby{
    char baby_name[50];
    char sex[6];
    char birthday[10];

    struct father father1;
    struct mother mother1;
};

struct baby *b1;
void display(int);

int main(){
    int baby_num;

    printf("Enter number of baby that is/are going to input: ");
    scanf("%d", &baby_num);

    display(baby_num);

    printf("\nNEW BORN IN KUANTAN HOSPITAL\n");
    for(int i=0; i<baby_num; i++){
        printf("\nBaby %d\n", i+1);
        printf("Baby Name: %s\n", b1[i].baby_name);
        printf("Sex: %s\n", b1[i].sex);
        printf("Birthday: %s\n", b1[i].birthday);
        printf("\nFather name: %s\n", b1[i].father1.dad_name);
        printf("Father age: %d", b1[i].father1.dad_age);
        printf("\nMother name: %s\n", b1[i].mother1.mom_name);
        printf("Mother age: %s\n", b1[i].mother1.mom_age);
    };
    return 0;
};

void display(int baby_num){
    int temp;

    b1 = (struct baby*) malloc(baby_num * sizeof(struct baby));
    for(int i=0; i<baby_num;i++){
        printf("Baby Name: ");
        scanf("%d", &temp);
        scanf("%[^\n]", b1[i].baby_name);
        printf("Sex: ");
        scanf("%s", b1[i].sex);
        printf("Birthday: ");
        scanf(" %s", b1[i].birthday);
        printf("Father name: ");
        scanf("%d", &temp);
        scanf("%[^\n]", b1[i].father1.dad_name);
        printf("Father age: ");
        scanf("%d", b1[i].father1.dad_age);
        printf("Mother name: ");
        scanf("%[^\n]", b1[i].mother1.mom_name);
        printf("Mother age: ");
        scanf(" %d", b1[i].mother1.mom_age);
    };
}