006_2D_pattern-problem1

/*Problem 1) Find how many non-zero element are in a matrix (two-dimensional array)- use as 
an example: 
10 ―4 0 
7 8 3
0 0 1
Read the values from input (scanf) using for loops and test your code one other set of values.*/


#include <stdio.h> 
int main() 
{ 
    int matrix[3][3]={ 
        {10,-4,0}, 
        {7,8,3}, 
        {0,0,1} 
    }; 
   int r,c; 
   int i, j; 
   int count=0; 
    printf("Input number of Rows for the matrix :"); 
    scanf("%d", &r); 
    printf("Input number of Columns for the matrix :"); 
    scanf("%d",&c); 
    printf("Input elements in the first matrix :\n"); 
        for(i=0;i<r;i++) 
         { 
             for(j=0;j<c;j++) 
             { 
            printf("element - [%d],[%d] : ",i,j); 
            scanf("%d",&matrix[i][j]); 
             } 
         } 
    printf("The matrix is :\n"); 
  for(i=0;i<r;i++) 
  { 
    for(j=0;j<c ;j++) 
      printf("% 4d",matrix[i][j]); 
     printf("\n"); 
  } 
     for(i=0; i<r; i++) 
     { 
      for(j=0; j<c; j++) 
      { 
        if(((i==j) && (matrix[i][j] != 1)) || ((i!=j) && (matrix[i][j] !=0))) 
  { 
    break; 
  } 
 } 
    } 
 
    for(i=0; i< r; i++){ 
         
        for (j=0; j<c; j++) { 
            if(matrix[i][j]!=0) 
                count++; 
        } 
        } 
    printf("non-zero elements in the matrix:%d\n", count); 
     return 0; 
 }