#include<stdio.h>
int i, j;
int main(){
	int n[7][7];
	for(i = 1; i <= 7; i++){
		for(j = 1; j <= 7; j++){
			printf("input (%d,%d): ", i, j);
			scanf("%d", &n[i][j]);
		}
	}
	//r1
	printf("\n\nMATRIX\tColumn1\tColumn2\tColumn3\tColumn4\tColumn5\tColumn6\tColumn7");
	for(i = 1; i <= 7; i++){
		printf("\nRow%d", i);
		for(j = 1; j <= 7; j++){
			printf("\t%d", n[i][j]);
		}
	}
	//r2
	printf("\n\nTotal elements in even rows");
	for(i = 1; i <= 7; i++){
		int total = 0;
		if(i % 2 != 0){
			for(j = 1; j <= 7; j++){
				total += n[i][j];
			}
		printf("\nTotal numbers of column%d = %d", i, total);
		}
	}
	//r3		chinh xac thi bug dang o doan nay`, ascending sort khong het
	int a;
	for(a = 1; a <= 7; a++){
		for(i = 1; i <= 7; i++){
	 		for(j = 7-1; j > i; j--){
	 	  		if(n[j-1][a] > n[j][a]){
	  	   	 		int temp = n[j-1][a];
	   	    		n[j-1][a] = n[j][a];
	    			n[j][a] = temp;
	    			
	    		//	int temp = n[j][a];
	   	    	//	n[j][a] = n[j-1][a];
	    		//	n[j-1][a] = temp;
	    		}
			}
		}
	}
	printf("\n\nSorted\tColumn1\tColumn2\tColumn3\tColumn4\tColumn5\tColumn6\tColumn7");
	for(i = 1; i <= 7; i++){
		printf("\nRow%d", i);
		for(j = 1; j <= 7; j++){
			printf("\t%d", n[i][j]);
		}
	}
	return 0;
}

/*
Exercise 5: Write a C program inputs a matrix of integer from the keyboard. Then do following tasks:
- Display the given matrix to the screen.
- Calculate total elements in even rows. Display result to the screen.
- Sorting all columns ascending. Display matrix after sorting to the screen.
23 56 45 85 65 89 65 45 3 16 34 42 12 46 56 78 12 54 87 -9 -8 45 334 54 65 89 1 5 3268 98 7 111 58 89 -100 0 -99 1345 432 1324 77 90  98 13 411 456 234 131 68

*/