54 lines
2.1 KiB
C
54 lines
2.1 KiB
C
/*
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HW8B
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Nicholas Pease
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Dot Matrix Operations - Revised & Continued
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "matrix_print_functions.c"
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int main() {
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int costInfo[1][3] = {3, 4, 5};
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printf("Enter daily sales in the format: regular#special#premium\n");
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int gasSales[3][3];
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char useless;
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// input and process directly into array
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for (int i = 0; i < 3; i++) {
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printf("Enter total gallons of gas sales on Day %d: ",i+1);
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scanf("%d%c%d%c%d",&gasSales[i][0],&useless,&gasSales[i][1],&useless,&gasSales[i][2]);
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}
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int firstR = 1;int firstC = 3;int secondR = 3;int secondC = 3;
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// check condition before continuing
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if (firstC == secondR && useless == '#') {
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int matrix3[firstR][secondC];
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// each row of first matrix
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// each column of second matrix
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// each column of first matrix
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// given that rows of second = columns of first
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for (int matrix1Row = 0; matrix1Row < firstR; matrix1Row++) {
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for (int matrix2Column = 0; matrix2Column < secondC; matrix2Column++) {
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matrix3[matrix1Row][matrix2Column] = 0;
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for (int matrix1Column = 0; matrix1Column < firstC; matrix1Column++) {
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matrix3[matrix1Row][matrix2Column]+= costInfo[matrix1Row][matrix1Column] * gasSales[matrix1Column][matrix2Column];
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}
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}
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}
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matrix_print(firstR, firstC, costInfo, secondR, secondC, gasSales, firstR, secondC, matrix3);
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int totalSales = 0;
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for (int i = 0; i < 3; i++) {
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printf("Total sales on Day %d: $%d\n",i+1,matrix3[0][i]);
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totalSales+=matrix3[0][i];
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}
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printf("Total sales on weekend: $%d\n",totalSales);
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} else if (useless != '#') {
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printf("Error: please follow the correct input format\nPlease try again.\n")
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} else {
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// Unable to multiply
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printf("Error: the %d x %d matrix can't be multiplied by the %d x %d matrix.\nReason: the number of columns of the 1st matrix must equal the number of rows of the 2nd matrix\n", firstR, firstC, secondR, secondC);
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}
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return 0;
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} |