part3.c

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

#define BUFSZ   80
#define SIZE    5

#define OP_QUIT 0
#define OP_ADD  1
#define OP_MUL  2
#define OP_DEL  3
#define OP_INS  4

#define RANGE_INVALID   -1
#define RANGE_ALL   0
#define RANGE_ONE   1
#define RANGE_TWO   2

typedef struct  Cell_t {
    int valid;
    int row,col;
} cell;

typedef struct  Range_t {
    int Type;
    cell    From;
    cell    To;
} range;

double  sheet[SIZE][SIZE];

int clearSheet() {
    int row,col;

    for (row=0;row<SIZE;row++)
        for (col=0;col<SIZE;col++)
            sheet[row][col]=0;

    return 0;
}

int printSheet() {
    int row,col;

    printf("\t A\t B\t C\t D\t E\n");
    for (row=0;row<SIZE;row++) {
        printf("%d", row+1);
        for (col=0;col<SIZE;col++) {
            printf("\t%1.2f", sheet[row][col]);
        }
        printf("\n");
    }

    return 0;
}

int setSheet(int row, int col, double val) {
    if ((row >= 0 && row < SIZE) && (col >= 0 && col < SIZE)) {
        sheet[row][col] = val;
    } else {
        return -1;
    }

    return 0;
}

double  getSheet(int row, int col) {
    return sheet[row][col];
}

void    doOperation(int op, range r, double insval) {
    double  result = 0;

    switch(op) {
    case    OP_QUIT:
        // invalid operation for this function
        break;
    case    OP_ADD:
        if (r.Type == RANGE_ALL) {
            int row, col;

            result = 0.0;
            for (row = 0; row < SIZE; row++)
                for (col = 0; col < SIZE; col++)
                    result += getSheet(row, col);
        } else if (r.Type == RANGE_ONE) {
            // invalid range for this operation
        } else if (r.Type == RANGE_TWO) {
        }
        fprintf(stderr, "%1.2lf\n", result);
        break;
    case    OP_MUL:
        if (r.Type == RANGE_ALL) {
            int row, col;

            result = 1;
            for (row = 0; row < SIZE; row++)
                for (col = 0; col < SIZE; col++)
                    result *= getSheet(row, col);
        } else if (r.Type == RANGE_ONE) {
            // invalid range for this operation
        } else if (r.Type == RANGE_TWO) {
        }
        fprintf(stderr, "%1.2lf\n", result);
        break;
    case    OP_DEL:
        if (r.Type == RANGE_ALL) {
            clearSheet();
        } else if (r.Type == RANGE_ONE) {
            int row = r.From.row;
            int col = r.From.col;
            sheet[row][col] = 0.0;
        } else if (r.Type == RANGE_TWO) {
            int row, col;
            for (row = r.From.row; row <= r.To.row; row++)
                for (col = r.From.col; col <= r.To.col; col++)
                    sheet[row][col] = 0.0;
        }
        break;
    case    OP_INS:
        if (r.Type == RANGE_ALL) {
            int row, col;
            for (row = 0; row < SIZE; row++)
                for (col = 0; col < SIZE; col++)
                    sheet[row][col] = insval;
        } else if (r.Type == RANGE_ONE) {
            int row = r.From.row;
            int col = r.From.col;
            sheet[row][col] = insval;
        } else if (r.Type == RANGE_TWO) {
            int row, col;
            for (row = r.From.row; row <= r.To.row; row++)
                for (col = r.From.col; col <= r.To.col; col++)
                    sheet[row][col] = insval;
        }
        break;
    default:
        break;
    }
}

int main(int argc, char **argv) {
    range   r;
    double  val;

    r.Type = RANGE_ALL;

    clearSheet();

    fprintf(stderr, ">> INS() 1.2;\n");
    doOperation(OP_INS, r, 1.2);    // Set all cell to 1.2
    printSheet();

    r.Type = RANGE_ONE;
    r.From.row = 0;         // row '1'
    r.From.col = 1;         // col 'B'

    fprintf(stderr, ">> INS(B1) 9.99;\n");
    doOperation(OP_INS, r, 9.99);   // Set B1 to 9.99
    printSheet();

    // This actually invalid rage from the question, but the subroutine support this
    r.Type = RANGE_TWO;
    r.From.row = 1;         // From: row '2'
    r.From.col = 2;         //       col 'C'
    r.To.row = 4;           // To:   row '5'
    r.To.col = 4;           //       col 'E'

    fprintf(stderr, ">> INS(C2:E5) 7.89;\n");
    doOperation(OP_INS, r, 7.89);   // Set C2:E5 to 9.99
    printSheet();

    fprintf(stderr, ">> DEL(C1:C5);\n");
    r.Type = RANGE_TWO;
    r.From.row = 0;         // From: row '1'
    r.From.col = 2;         //       col 'C'
    r.To.row = 4;           // To:   row '5'
    r.To.col = 2;           //       col 'C'
    doOperation(OP_DEL, r, 0.0);    // DEL
    printSheet();

    fprintf(stderr, ">> ADD();\n");
    r.Type = RANGE_ALL;
    doOperation(OP_ADD, r, 0.0);    // ADD ALL

    return 0;
}