c - 按 C 行中的第一个元素对矩阵的行进行排序

Question

我有一个矩阵:

3  3 -1 -1
1  1  1 -1
6  6  6  6
0 -1 -1 -1

我需要的是这个输出:

0 -1 -1 -1
1  1  1 -1
3  3 -1 -1
6  6  6  6

我怎样才能像这样正确排序？

Answer 1

希望这段代码对您有所帮助。您应该自己完成注释部分才能得到结果。

#define RAW_NUM 4
#define COL_NUM  4  

int main () {
    int ** matrix = malloc (RAW_NUM * sizeof (int *));
    // you should be sure about successful allocation
    int i, j;
    for (i=0; i < RAW_NUM; i++) {
        matrix [i]= malloc (COL_NUM * sizeof (int);
        // you should be sure about successful allocation
    }
    // fill the matrix here
    for (i=0; i < RAW_NUM - 1; i++) {
        for (j=i +1; j < RAW_NUM; i++) 
        if (*matrix [i] > *matrix [j])
       {
           // please swap matrix [i] and matrix [j] here
       }
   }
}