Im given an file with an huge array of values(topo983by450.txt) and I need to to read the name of a data le from the command line, open the le, determine the size of the array required, then dynamically allocate both the 2d array topography[][] and the 1d array sumList[]. I having trouble figuring out how to use malloc and put it into calc sums.

#include #include #include

void calcSums(int** topog, int* sumList ); int **malloc2d(int r, int c); int x; //a global variable

int main(int argc, char* argv[]) { int** topography = malloc2d(ROWS ,COLS); int* sumList =

int ** a; //a is a[][], a 2d array int r,c; a = malloc2d(x,y); for(r=0; r

{ printf(" %d ", a[r][c]); }

// printf( " "); }

char lineRead[100]; int ivalRead; double dvalRead; // file to be read must be in project directory FILE* inFile = fopen("topo983by450.txt", "r"); //open a file from user for reading

//FILE* inFile = fopen("greenEggs.txt", "r"); //open a file from user for reading

if( inFile == NULL) // should print out a reasonable message of failure here { printf("no bueno "); exit(1); }

/************** READ: reading inputs ***********/ fscanf(inFile,"%d",&ivalRead); printf("I just read: %d ", ivalRead); system("pause");

fscanf(inFile,"%d",&ivalRead); printf("I just read: %d ", ivalRead); system("pause");

fscanf(inFile,"%d",&ivalRead); printf("I just read: %d ", ivalRead); system("pause");

//read through the end while( fscanf(inFile,"%d",&ivalRead) != EOF ) { fscanf(inFile,"%d",&ivalRead); // printf("I just read: %d ", ivalRead); } printf("done. Last value read was %d ", ivalRead); x = ivalRead; system("pause");

while( fgets(lineRead, 1000, inFile) != NULL) //store line just read as string "lineRead" printf("I just read the line: %s", lineRead); fclose(inFile); return 0; }

int** malloc2d(int r, int c) { int i; int** t = malloc(r * sizeof(int*)); for (i = 0; i < r; i++) t[i] = malloc(c * sizeof(int)); return t; }

void calcSums(int** topog, int* sumList) { int i,j, sum, sum2, sum3, row; for( i=0; i= ROWS) { sum3 = 1000000; } else { sum3 = abs(topog[row][j]-topog[row+1][j+1]); }

if (sum <= sum2 && sum<= sum3) { sums[i] += sum;

} if (sum2 < sum && sum2 < sum3) { sums[i] += sum2; row--; } if (sum3 < sum&& sum3< sum2) { sums[i] += sum3; row++; } else if(sum2==sum3) // random func { sums[i] += sum3; srand(time(0)); int random = rand()%2; if(random==0) { row--; } else { row++; } } } }

sums[i];

}