how to get user input in c

#include <stdio.h>
//this is for entering and storing strings
int main(){
    char name[20];

    printf("Enter a name : ");
    scanf("%s", &name);

    printf("the name entered is: %s\n", name);



return 0;
}#include <stdio.h>
//this is for storing numbers
int main(){
	
    int age; //this makes a vairable for you to store the value in
    printf("enter in your age: "); //this prints a prompt for the user
    scanf("%d", &age); //this takes in the argument given and stores it
                       //into the address of age

	return 0;
}#include <stdio.h>
int main()
{
    int testInteger;
    printf("Enter an integer: ");
    scanf("%d", &testInteger);  
    printf("Number = %d",testInteger);
    return 0;
}#include <stdio.h>
int main()
{
    char chr;
    printf("Enter a character: ");
    scanf("%c",&chr);     
    printf("You entered %c.", chr);  
    return 0;
}