Can some one help me to finish this c language quiz i'm stack on menu 3 where i have...

[samson m]

...to edit the name.? include <stdio.h>
#include <string.h>

main()
{
int menu, i, count=0,y;
char name[100][10];
char phone[100][20];
char sex[100];
int year[100];
char key[10];
while(1){
printf("Menu : 1.Add 2.output 3.Edit 4.Search name 5.Age search 0.end : ");
scanf("%d",&menu);

if (menu == 1){
// Add Task
printf("Enter. (Name, phone number, gender [M, F] birth year) : ");
scanf("%s %s %c %d",name[count], phone[count], &sex[count], &year[count]);
count++;
}
else if (menu == 2){
// Output
printf("Name\t phone\t gender[M,F]\t birth year \n");
for(i=0; i<count; i++){
printf("%s\t %s\t\t %c\t\t %d\n",name,phone,sex,year);
}
}
else if (menu == 3){
// edit
}
else if (menu == 4){
// Find the name of action
printf("Name? ");
scanf("%s",&key);
printf("Name\tphone\tgender[M, F]\t birthyear\n");
for(i=0; i<count; i++){
if(strstr(name, key))
printf("%s\t %s\t\t %c\t\t %d\n",name, phone, sex, year);
}
}
else if (menu == 5){
// Age search
printf("Life years? ");
scanf("%d",&y);
printf("Name\tphone\t gender[M,F]\t birthyear\n");
for(i=0; i<count; i++){
if(y == year )
printf("%s\t %s\t\t %c\t\t %d\n",name, phone, sex, year);
}

}
else if (menu == 0){
// Shut down operations
return;
}
}

}