Yêu cầu:
Tính tổng các giá trị trên 1 dòng trong ma trận số thực
Thuật toán:
1. Viết hàm nhập vào ma trận số thực
2. Viết hàm tính tổng các giá trị trên 1 dòng trong ma trận
Code:
/*****Sum all of elements in specified row in matrix******** *Author: vncoding *Date : 31/03/2019 ************************************************************/ #include <stdio.h> #include <conio.h> #include <stdlib.h> #define N 100 #define M 100 void ImportData(float[][M], int, int, char*); void PrintMatrix(float[][M], int, int); float SumRowInMatrix(float[][M], int, int, int); void main() { int nRow, nCol; int iRow; float A[N][M]; printf("\nNumber of row: "); scanf("%d", &nRow); printf("\nNumber of column: "); scanf("%d", &nCol); do { printf("\nNumber of specified row: "); scanf("%d", &iRow); } while (iRow <= 0 || iRow > nRow); ImportData(A, nRow, nCol, "A"); PrintMatrix(A, nRow, nCol); printf("\nSum all of elements in row (%d) matrix: %f", iRow, SumRowInMatrix(A, nRow, nCol, iRow)); getch(); } /************************************************************* * Function : SumRowInMatrix() * Parameter : A[][M]: input matrix (I) nRow : row number (I) nCol : column number(I) specRow : specified row(I) * Return : int * Description : Sum of all elements in row of matrix *************************************************************/ float SumRowInMatrix(float A[][M], int nRow, int nCol, int specRow) { int iRow, iCol; float sum = 0; for (iRow = 0; iRow < nRow; iRow++) { for (iCol = 0; iCol < nCol; iCol++) { if ((iRow + 1) == specRow) sum += A[iRow][iCol]; } } return sum; } /************************************************************* * Function : ImportData() * Parameter : A[][M]: input matrix (I) nRow : row number (I) nCol : column number(I) nameMatrix: matrix name (I) * Return : void * Description : Import matrix data *************************************************************/ void ImportData(float Matrix[][M], int nRow, int nCol, char* nameMatrix) { int iRow, iCol; for (iRow = 0; iRow < nRow; iRow++) for (iCol = 0; iCol < nCol; iCol++) { printf("\n%s[%d][%d] = ", nameMatrix, iRow, iCol); scanf("%f", &Matrix[iRow][iCol]); } } /************************************************************* * Function : PrintMatrix() * Parameter : Matrix: input matrix (I) nRow : row number (I) nCol : column number(I) * Return : void * Description : Display matrix data *************************************************************/ void PrintMatrix(float Matrix[][M], int nRow, int nCol) { int iRow, iCol; printf("\nA = "); for (iRow = 0; iRow < nRow; iRow++) { printf("\n"); for (iCol = 0; iCol < nCol; iCol++) { printf("\t%.2f\t", Matrix[iRow][iCol]); } } }
Kết quả:
Number of row: 3
Number of column: 4
Number of specified row: 1
A[0][0] = 2.3
A[0][1] = 4.5
A[0][2] = -4.5
A[0][3] = 9
A[1][0] = 34
A[1][1] = -6.7
A[1][2] = -4.5
A[1][3] = 8.9
A[2][0] = 2.3
A[2][1] = 12.2
A[2][2] = -3.4
A[2][3] = 5.6
A =
2.30 4.50 -4.50 9.00
34.00 -6.70 -4.50 8.90
2.30 12.20 -3.40 5.60
Sum all of elements in row (1) matrix: 11.300000
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