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    Modify the rain program in L isting 10.7 so that it does the calculations using pointers instead of subscripts. (You still have to declare and initialize the array.)
    10.7
    /* rain.c — finds yearly totals yearly average and monthlyaverage for several years of rainfall data */#include #define MONTHS 12// number of months in a year#define YEARS 5// number of years of dataint main(void){// initializing rainfall data for 2000 – 2004const float rain[YEARS][MONTHS] ={{ 4.3 4.3 4.3 3.0 2.0 1.2 0.2 0.2 0.4 2.4 3.5 6.6 }{ 8.5 8.2 1.2 1.6 2.4 0.0 5.2 0.9 0.3 0.9 1.4 7.3 }{ 9.1 8.5 6.7 4.3 2.1 0.8 0.2 0.2 1.1 2.3 6.1 8.4 }{ 7.2 9.9 8.4 3.3 1.2 0.8 0.4 0.0 0.6 1.7 4.3 6.2 }{ 7.6 5.6 3.8 2.8 3.8 0.2 0.0 0.0 0.0 1.3 2.6 5.2 }};int year month;float subtot total;
    printf( YEAR RAINFALL (inches)n);for (year = 0 total = 0; year < YEARS; year++){ // for each year sum rainfall for each monthfor (month = 0 subtot = 0; month < MONTHS; month++)//subtot += rain[year][month];subtot += *(*(rain + year) + month);printf(%5d %15.1fn 2000 + year subtot);total += subtot; // total for all years}printf(nThe yearly average is %.1f inches.nntotal / YEARS);printf(MONTHLY AVERAGES:nn);printf( Jan Feb Mar Apr May Jun Jul Aug Sep Oct );printf( Nov Decn); for (month = 0; month < MONTHS; month++){ // for each month sum rainfall over yearsfor (year = 0 subtot = 0; year < YEARS; year++)//subtot += rain[year][month];subtot += *(*(rain + year) + month);printf(%4.1f subtot / YEARS);}printf(n); return 0;}

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