datatype array_name[count of elements]
If you dont want to use much variables of the same type then use arrays! You just define a variable(see variables) and then you add [such brackets] with the number of the count of the wanted variables. The count starts ALWAYS on 0. For initializing you set {} with the values after a ','. Specially a char array is a string. For more info see 'string'. 
#include <stdio.h>
int main()
{
	int array_var[10];//defining an array
	int array_var2[3]={3,4,5};//defining and initializing an array.
	array_var[4]=10;//the 5th Element of the array.
	printf("array_var[3]: %d",array_var[3]);//well, not defined elements are usually 0.
	printf("array_var[4]: %d",array_var[4]);
	printf("array_var2[1]: %d",array_var[3]);
	return 0;
}