3 11 C:\for cccccc works\main.c [Error] expected ';', ',' or ')' before numeric constant 6 22 C:\for cccccc works\main.c [Note] in expansion of macro 'M' C:\for cccccc works\main.c In function 'main': 10 5 C:\for cccccc works\main.c [Warning] implicit declaration of function 'column_diff' [-Wimplicit-function-declaration] C:\for cccccc works\main.c At top level: 3 11 C:\for cccccc works\main.c [Error] expected ';', ',' or ')' before numeric constant 14 22 C:\for cccccc works\main.c [Note] in expansion of macro 'M' 28 C:\for cccccc works\Makefile.win recipe for target 'main.o' failed
时间: 2023-12-17 09:05:01 浏览: 306
非常感谢您提供的编译错误信息,我已经发现了问题。
第一个编译错误是因为在函数定义中,`N` 是一个常量,无法作为形参。为了解决这个问题,可以声明函数时将 `N` 定义为常量,如下所示:
```c
void column_diff(int M, const int N, int A[][N]);
```
同时,在函数定义中,需要将矩阵的第二维定义为一个常量,以便在编译时可以确定数组的大小,如下所示:
```c
void column_diff(int M, const int N, int A[][N]) {
int max, min, diff;
for (int j = 0; j < N; j++) {
max = A[0][j];
min = A[0][j];
for (int i = 1; i < M; i++) {
if (A[i][j] > max) {
max = A[i][j];
}
if (A[i][j] < min) {
min = A[i][j];
}
}
diff = max - min;
printf("The difference of column %d is %d\n", j+1, diff);
}
}
```
第二个编译错误是因为在宏定义中,不能在数字前面加上 `#` 符号。修改后的宏定义如下:
```c
#define M 3
#define N 4
```
第三个编译警告是因为在主函数中调用了一个未声明的函数 `column_diff`。为了解决这个问题,需要在程序开头声明一下 `column_diff` 函数,如下所示:
```c
#include <stdio.h>
#define M 3
#define N 4
void column_diff(int M, const int N, int A[][N]);
int main() {
int A[M][N] = {{3, 5, 2, 7}, {1, 4, 6, 8}, {9, 2, 3, 0}};
column_diff(M, N, A);
return 0;
}
void column_diff(int M, const int N, int A[][N]) {
int max, min, diff;
for (int j = 0; j < N; j++) {
max = A[0][j];
min = A[0][j];
for (int i = 1; i < M; i++) {
if (A[i][j] > max) {
max = A[i][j];
}
if (A[i][j] < min) {
min = A[i][j];
}
}
diff = max - min;
printf("The difference of column %d is %d\n", j+1, diff);
}
}
```
现在,程序应该能够正常编译和运行了。如果还有问题,请随时问我。
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