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Lab4/lab4_1.c

+#include  <stdio.h>
+int main() {
+	int r;  //r - row of matrix
+	int c;  //c stands for columns
+	int i;
+	int j;
+	float A[3][3];
+	float B[3][3];
+	float sumAB[3][3];
+	float subtractAB[3][3];
+	float multiplicationA[3][3];
+	float multiplicationB[3][3];
+	
+	printf("Please, enter the rows and columns of matrices:\n THEY SHOULD BE EQUAL!!!\n");
+	scanf("%d%d", &r, &c);
+	
+	printf("Please, enter the elements of the first matrix:\n");
+	
+	for(i=0; i<r; i++) 
+	{
+		for(j=0; j<c; j++)
+		 {
+			scanf("%f", &A[i][j]);
+		}
+	} 
+	
+	printf("Please, enter the elements of the second matrix:\n");
+	
+	for(i=0; i<r; i++)
+	 {
+		for(j=0; j<c; j++) 
+		{
+			scanf("%f", &B[i][j]);
+		}
+	}
+	
+	printf("SUM\n");
+	for(i=0; i<r; i++)
+	 {
+		for(j=0; j<c; j++)
+		 {
+			sumAB[i][j]= A[i][j] + B[i][j]; 
+			
+			printf("%f, ", sumAB[i][j]);
+		}
+		printf("\n");
+	} 
+	
+	
+	printf("SUBTRACTION\n");
+	for(i=0; i<r; i++)
+	 {
+		for(j=0; j<c; j++)
+		 {
+			subtractAB[i][j]= A[i][j] - B[i][j]; 
+			
+			printf("%f, ", subtractAB[i][j]);
+		}
+		printf("\n");
+	} 
+	
+	
+	printf("Diagonals\n");
+	
+	for(i=0; i<r; i++) 
+	{
+		for(j=0; j<c; j++)
+		 {
+			if(i==j)
+			{
+				multiplicationA[i][j]= A[i][j] * multiplicationA[i][j];
+			}
+		}
+		printf("\n");
+		printf("%f, ",multiplicationA[i][j]);
+	}	
+		
+	
+
+	
+return 0;	
+}