我不断收到错误 C2440 '=': cannot convert from 'int (__cdecl )(int ,int ,int,int)' to 'int *

香蕉派

我一直在这c = sum_matrix部分出错。

C2440 '=': 无法从 'int *(__cdecl *)(int *,int *,int,int)' 转换为 'int *

这是整个代码（虽然我在这里被卡住了，但还没有完成）：

#define _CRT_SECURE_NO_WARNINGS
#include <conio.h>
#include <cstdio>

void read_matrix(int*, int, int);
int* sum_matrix(int*, int*, int, int);

void main()
{
    int a[20][20], b[20][20], i, n = 0, m = 0, * p, * q, * c;
    printf_s("Enter the dimensions of the matrices: ");
    scanf_s("%d %d", n, m);
    p = &a[0][0];
    q = &b[0][0];
    read_matrix(p, n, m);
    read_matrix(q, n, m);
    c = sum_matrix;
}

int* sum_matrix(int* a, int* b, int n, int m)
{
    int *c, i, j, p;
    if (c = new int[n*m])
        for (i = 0; i < n; i++)
            for (j = 0; j < m; j++)
                *(c + i * n + j) = *(a + i * n + j) + *(b + i * n + j);
    return c;
}

void read_matrix(int* a, int n, int m)
{
    int i = 0, j = 0;
    printf_s("Enter the elements of the matrix (%d values): ", n * m);
    for (i = 0; i < n; i++)
        for (j = 0; j < m; j++)
            scanf_s("%d", (a + i * n + j));
}

我正在使用 Visual Studio 16.3.8

gkpln3

sum_matrix 是一个函数，你需要像这样用括号调用它：

sum_matrix(a, b, c, d)

将 a,b,c,d 替换为您要输入的参数。

我想你的意思是这样的：

#define _CRT_SECURE_NO_WARNINGS
#include <conio.h>
#include <cstdio>

void read_matrix(int*, int, int);
int* sum_matrix(int*, int*, int, int);

void main()
{
    int a[20][20], b[20][20], i, n = 0, m = 0, * p, * q, * c;
    printf_s("Enter the dimensions of the matrices: ");
    scanf_s("%d %d", n, m);
    p = &a[0][0];
    q = &b[0][0];
    read_matrix(p, n, m);
    read_matrix(q, n, m);
    c = sum_matrix(a, b, n, m);
}

int* sum_matrix(int* a, int* b, int n, int m)
{
    int *c, i, j, p;
    if (c = new int[n*m])
        for (i = 0; i < n; i++)
            for (j = 0; j < m; j++)
                *(c + i * n + j) = *(a + i * n + j) + *(b + i * n + j);
    return c;
}

void read_matrix(int* a, int n, int m)
{
    int i = 0, j = 0;
    printf_s("Enter the elements of the matrix (%d values): ", n * m);
    for (i = 0; i < n; i++)
        for (j = 0; j < m; j++)
            scanf_s("%d", (a + i * n + j));
}