Name this program sum2.c – Using the Data2 file , write a program that allocates

Question

Name this program sum2.c – Using the Data2 file, write a program that allocates an array of rows and columns based on what the user specifies as command line arguments. It should then compute and print the sum of all the elements on the very last row of the array. C programming only please.

DOWNLOAD DATA2 FILE: (wget or curl) troll.cs.ua.edu/cs100/labs/Data2

EXAMPLE INPUT AND OUTPUT FOR PROGRAM:

./a.out 1000 1000

The sum of the numbers on the last row is 48848451

./a.out 2000 500

The sum of the numbers on the last row is 24574952

./a.out 250000 4

The sum of the numbers on the last row is 148908

Explanation / Answer

You should have a file named "DATA.txt" containg the data downloaded.

Code:

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char* argv[]){
   int nrow=atoi(argv[1]);
   int ncol=atoi(argv[2]);

   int array[nrow][ncol];

   FILE* myFile;
myFile = fopen("DATA.txt", "r");

int i,j;
long long int sum=0;
for(i=0;i<nrow;++i){
   for(j=0;j<ncol;++j){
       fscanf(myFile, "%d", &array[i][j]);
       if(i==nrow-1)
           sum += array[nrow-1][j];
   }
}

printf("%lld ",sum);

   return 0;
}

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