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警告:从不兼容的点类型开始
原标题:warning: initialisation from incompatible pointer type
  • 时间:2012-04-10 04:00:14
  •  标签:
  • c

自那时以来,我已经对C进行了触动,因此,我确实对它感到不舒服。 我写了一个小型方案,利用两个动态阵列建立一个矩阵。 然而,我听从这一警告,我不理解为什么? 我猜测,我不敢确定点人。 谁能帮助我指出我的问题是什么? 感谢。

sm.c: In function ‘main’:
sm.c:11:13: warning: initialisation from incompatible pointer type [enabled by default]
sm.c: In function ‘makeMatrix’:
sm.c:27:3: warning: return from incompatible pointer type [enabled by default]


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

typedef int (**intptr) (); 
intptr makeMatrix(int n); 

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

  int n = 2;  

  int **A = makeMatrix(n);
  if(A) { 
    printf("A
");
  }
  else printf("ERROR");
}

intptr makeMatrix(int size) {
  int **a = malloc(sizeof *a * size);
  if (a) 
  {
    for (int i = 0; i < size; i++)
    {   
      a[i] = malloc(sizeof *a[i] * size);
    }   
  }
  return a;
}
最佳回答

你在这里提出一些问题:

typedef int (**intptr) (); 
intptr makeMatrix(int n); 

...

int **A = makeMatrix(n);

<代码>intptr 第3类:宣布某一职能点的点名,该点具有一定数目的论据,并填写<条码>。 <代码>A不是int

你需要写:

int **makeMatrix(int n);


int **A = makeMatrix(n);

采用<代码> 类型f 在这里赢得很多帮助。

typedef int **(*intptr)();

这宣布了把点人带至<条码>的一个要点。 但写作

intptr makeMatrix(int n);

声明makeMatrix(>)将某一功能的点名,而不是int **/code>。

问题回答

页: 1 取消这一点,你应当做得好。





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