Question

Write a proper C program that makes use of a function to accept user inputs and updates members of a structure. The structure should contain three members: LastName,Gender and Age. LastName will not exceed 30 characters.

The structure variable should be created in the main function. The function should be called to populate the structure variable. The assigned values of the members should be appended to a text file in the main function.

The input and output should work for any number of records. However for testing purpose, make this work for two structure variables.

Answer 1

#include<stdio.h>
#include<stdlib.h>
struct Student{
char lastName[30];
char gender;
int age;
};
int main(){

printf("Enter the number of students: ");
int n, i;
scanf("%d",&n);
struct Student s[n];
for(i = 0;i<n;++i){
printf("Enter last name: ");
scanf("%s",s[i].lastName);
printf("Enter gender (M/F) ");
scanf(" %c",&s[i].gender);
printf("Enter age ");
scanf(" %d",&s[i].age);
}

for(i = 0;i<n;++i){
printf("Name: %s\n",s[i].lastName);
printf("Gender: %c\n",s[i].gender);
printf("Age: %d\n",s[i].age);

}
FILE *f = fopen("file.txt", "w");
if (f == NULL)
{
printf("Error opening file!\n");
exit(1);
}

for(i = 0;i<n;++i){

fprintf(f, "Name: %s\n", s[i].lastName);
fprintf(f, "Gender: %c\n", s[i].gender);
fprintf(f, "Age: %d\n", s[i].age);

}

fclose(f);

}
===========
See Output


日ロ+ compile 1 Execute l > Share Code main.c 1 Name: kUNDRA 2 Gender: m 3 Age: 12 4 Name: ddd 5 Gender: d 6 Age: 23 7 * New Project-20170427 file.txt × 曰曰root main.c file.txt Default Term +Browser Enter age 23 Name: Rahul Gender: M Age: 2 Name: kUNDRA Gender: M Age: 23 sh-4.2$ gcc -o main *.C sh-4.2ş main Enter the number of students: 2 Enter last name: kUNDRA Enter gender (M/F) m Enter age 12 Enter last name: ddd Enter gender (M/F) d Enter age 23 Name: kUNDRA Gender: m Age: 1:2 Name: ddd Gender: d Age: 23 sh-4.2$|



Thanks, let me know if there is any concern.