Yêu cầu:
Tính tổng các số dương trong mảng các số thực
Thuật toán:
1. Viết hàm nhập vào ma trận
2. Viết hàm tính tổng các phần tử dương trong ma trận
Code:
/*****Sum all of positive elements 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 SumPostInMatrix(float A[][M], int, int); void main() { int nRow, nCol; float A[N][M]; printf("\nNumber of row: "); scanf("%d", &nRow); printf("\nNumber of column: "); scanf("%d", &nCol); ImportData(A, nRow, nCol, "A"); PrintMatrix(A, nRow, nCol); printf("\nSum all of positive elements in matrix: %f", SumPostInMatrix(A, nRow, nCol)); getch(); } /************************************************************* * Function : SumPostInMatrix() * Parameter : A[][M]: input matrix (I) nRow : row number (I) nCol : column number(I) * Return : float * Description : Sum of positive element in matrix *************************************************************/ float SumPostInMatrix(float A[][M], int nRow, int nCol) { int iRow, iCol; float sum = 0.0; for (iRow = 0; iRow < nRow; iRow++) { for (iCol = 0; iCol < nCol; iCol++) { if (A[iRow][iCol] > 0) 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
A[0][0] = 3
A[0][1] = 4.5
A[0][2] = -5.6
A[0][3] = 7.2
A[1][0] = 9.4
A[1][1] = 2
A[1][2] = 0
A[1][3] = -3.5
A[2][0] = 7.8
A[2][1] = 8.9
A[2][2] = -2.9
A[2][3] = 3.4
A =
3.00 4.50 -5.60 7.20
9.40 2.00 0.00 -3.50
7.80 8.90 -2.90 3.40
Sum all of positive elements in matrix: 46.199997
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