You can do it in many way.
Using an Array
You can just add an array for the country names and index it just like you index your data.
#define NUM_COUNTRIES 5
const char * countryNames[NUM_COUNTRIES] =
{
"Country1",
"Country2",
"India",
"Country3",
"Country4"
};
//data given in question
const int data[NUM_COUNTRIES][12] =
{
{130626, 54790, 18736, 7, 16, 63, 131, 166, 155, 223, 438, 887},
{329047, 6222, 1488, 18, 23, 118, 958, 2163, 2422, 3169, 4007, 7657},
{ 99643, 52946, 17848, 87, 79, 130, 634, 581, 394, 428, 500, 2251},
{282143, 115351, 46499, 208, 196, 301, 793, 1027, 1428, 2424, 3121, 4204},
{ 90720, 40829, 14887, 96, 157, 464, 626, 718, 1063, 1413, 1197, 1250}
};
Using Structures
With the usage of structures, you can group belonging data together, you do not need to reference multiple individual, independent variables.
#define NUM_COUNTRIES 5
#define NUM_MONTHS 12
typedef struct
{
const char * countryName;
int montlyVisitorNumber[NUM_MONTHS];
} TourismData;
const TourismData tourismData[NUM_COUNTRIES] =
{
// CountryName, Jan, Feb, Mar, Apr, Maj, Jun, Jul, Aug, Sep, Oct, Nov, Dec
// --------------------------------------------------------------------------------------------
{ "Country1", { 130626, 54790, 18736, 7, 16, 63, 131, 166, 155, 223, 438, 887 } },
{ "Country2", { 329047, 6222, 1488, 18, 23, 118, 958, 2163, 2422, 3169, 4007, 7657 } },
{ "India", { 99643, 52946, 17848, 87, 79, 130, 634, 581, 394, 428, 500, 2251 } },
{ "Country3", { 282143, 115351, 46499, 208, 196, 301, 793, 1027, 1428, 2424, 3121, 4204 } },
{ "Country4", { 90720, 40829, 14887, 96, 157, 464, 626, 718, 1063, 1413, 1197, 1250 } }
};
Later, in your code your can refer to the country names and the visitor numbers as below:
printf("%s had %d visitors\n", tourismData[countryIndex].countryName, tourismData[countryIndex].montlyVisitorNumber[monthIndex]);
Of course, you can use whatever names you like, it just makes sense to use talkative names. Also, there could be other options, but usually arrays and structures (or classes if you're using C++) are the most popular.