: define a number of functions (is a custom function), using the two dimensional array as the incoming parameters, calculation of 2 d and the product of the two diagonal elements in an array, the main function of the input a two-dimensional array of 4 * 4, call the defined function, into the matrix, the output in the main function,
Recently learn C language, this is unlikely to function parameters, want to half a day or do not to come out, trouble, help me, thank you,

CodePudding user response:

For your reference

 
#include  

Void Array1 (int arr [], [4], int * a, int * b) 
{
int i, j; 
for (i=0; i<4. I++) 
{
for (j=0; J<4. J++) 
{
If (I==j) 
{
* a +=arr [I] [j]; 
* b *=arr [I] [j]; 
} 
} 
} 
} 

Void Array2 (int arr [], [4], int * a, int * b) 
{
int i, j; 
for (i=0; i<4. I++) 
{
for (j=0; J<4. J++) 
{
If (j==(3 I)) 
{
* a +=arr [I] [j]; 
* b *=arr [I] [j]; 
} 
} 
} 
} 

Int main () 
{
Int arr [4] [4]={0}; 
Int I, j, sum1=0, prod1=1, sum2=0, prod2=1; 

for (i=0; i<4. I++) 
{
for (j=0; J<4. J++) 
The scanf (" % d ", & amp; Arr [I] [j]); 
} 

Array1 (arr, & amp; Sum1, & amp; Prod1); 
Array2 (arr, & amp; Sum2, & amp; Prod2); 

Printf (" sum1=% d, prod1=% d \ n ", sum1, prod1); 
Printf (" sum2=% d, prod2=% d \ n ", sum2, prod2); 

return 0; 
}