Answer:
Here's an example program in C that uses structures to input and display information for 100 students:
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#include <stdio.h>
struct Student {
int roll;
char name[50];
char address[100];
float mark;
};
int main() {
struct Student s[100];
int i;
// Input information for each student
for(i = 0; i < 100; i++) {
printf("Enter information for student %d:\\", i+1);
printf("Roll number: ");
scanf("%d", &s[i].roll);
printf("Name: ");
scanf("%s", s[i].name);
printf("Address: ");
scanf("%s", s[i].address);
printf("Mark: ");
scanf("%f", &s[i].mark);
}
// Display information for each student
printf("Student Information:\\");
for(i = 0; i < 100; i++) {
printf("Roll number: %d\\", s[i].roll);
printf("Name: %s\\", s[i].name);
printf("Address: %s\\", s[i].address);
printf("Mark: %.2f\\", s[i].mark);
printf("\\");
}
return 0;
}
This program declares a structure called Student that contains fields for roll number, name, address, and mark. It then creates an array of 100 Student structures and uses a loop to input information for each student. Finally, it uses another loop to display the information for each student.