Ejemplo039.c File Reference

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

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Functions
double *	crearMat (int r, int c)
int	capturar (double *M, int r, int c, char *str)
int	imprimir (double *M, int r, int c)
double *	multiplicar (double *M1, int r1, int c1, double *M2, int r2, int c2)
int	main (int argc, char *argv[])

Function Documentation

capturar()

int capturar	(	double *	M,
		int	r,
		int	c,
		char *	str )

Definition at line 13 of file Ejemplo039.c.

{
    int i, j;
    for(i=0; i<r; i++)
        for(j=0; j<c; j++)
        {
            printf("%s[%d][%d] = ", str, i+1, j+1);
            scanf("%lf", M+c*i+j);
        }
    return 0;
}

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crearMat()

double * crearMat	(	int	r,
		int	c )

Definition at line 4 of file Ejemplo039.c.

{
    double *M;
    M = (double*)malloc(r*c*sizeof(double));
    if(M==NULL)
        return NULL;
    return M;
}

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imprimir()

int imprimir	(	double *	M,
		int	r,
		int	c )

Definition at line 25 of file Ejemplo039.c.

{
    int i, j;
    for(i=0; i<r; i++)
    {
        for(j=0; j<c; j++)
            printf("%.4lf\t", M[c*i+j]);
        printf("\n");
    }
    return 0;
}

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main()

int main	(	int	argc,
		char *	argv[] )

Definition at line 59 of file Ejemplo039.c.

{
    int rA, rB, cA, cB;
    double *A, *B, *C;
    do{
        printf("Ingrese el numero de renglones de A: ");
        scanf("%d", &rA);
    }while(rA<1);
    do{
        printf("Ingrese el numero de columnas de A: ");
        scanf("%d", &cA);
    }while(cA<1);
    A = crearMat(rA, cA);
    if(A==NULL)
        return 1;
    capturar(A, rA, cA, "A");
    do{
        printf("Ingrese el numero de renglones de B: ");
        scanf("%d", &rB);
    }while(rB<1);
    do{
        printf("Ingrese el numero de columnas de B: ");
        scanf("%d", &cB);
    }while(cB<1);
    B = crearMat(rB, cB);
    if(B==NULL)
    {
        free(A);
        return 2;
    }
    capturar(B, rB, cB, "B");
    C = multiplicar(A, rA, cA, B, rB, cB);
    if(C==NULL)
    {
        free(A);
        free(B);
        return 4;
    }
    printf("A\n");
    imprimir(A, rA, cA);
    printf("B\n");
    imprimir(B, rB, cB);
    printf("C\n");
    imprimir(C, rA, cB);
    free(A);
    free(B);
    free(C);
    return 0;
}

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multiplicar()

double * multiplicar	(	double *	M1,
		int	r1,
		int	c1,
		double *	M2,
		int	r2,
		int	c2 )

Definition at line 37 of file Ejemplo039.c.

{
    int i, j, k;
    double *M3;
    if(c1!=r2)
    {
        printf("Error: En el tamaño de las matrices.\n");
        return NULL;
    }
    M3 = crearMat(r1, c2);
    if(M3==NULL)
        return NULL;
    for(i=0; i<r1; i++)
        for(j=0; j<c2; j++)
            for(k=0, M3[i*c1+j]=0; k<c1; k++)
                M3[i*c2+j] += M1[i*c1+k]*M2[k*c2+j];
//              M3[i][j] = M3[i][j]+M1[i][k]*M2[k][j]
//              M3[i][j] += M1[i][k]*M2[k][j]
//              M3[i*c2+j] += M1[i*c1+k]*M2[k*r2+j]
    return M3;
}

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