윤성우님의 C 프로그래밍 연습문제 : 16-1

문제1]
#include <stdio.h> int main(void) { int multi[8][9]; int i, j; for(i = 0; i < 8; i++) { for(j = 0; j < 9; j++) { multi[i][j] = (i+2) * (j+1); printf("%d\t", multi[i][j]); } putchar('\n'); } return 0; }
문제2]
#include <stdio.h> int main(void) { int arr1[2][4], arr2[4][2]; int i, j; for(i = 0; i < 2; i++) { for(j = 0; j < 4; j++) { arr1[i][j] = (i*4) + (j+1); arr2[j][i] = arr1[i][j]; printf("%d\t", arr1[i][j]); } putchar('\n'); } printf("-------------------------\n"); for(i = 0; i < 4; i++) { for(j = 0; j < 2; j++) { printf("%d\t", arr2[i][j]); } putchar('\n'); } return 0; }
문제3]
#include <stdio.h> void input_score(void); void save_total(void); void print_record(void); int record[5][5]; //a list of students records int main(void) { input_score(); save_total(); record[4][4] = 0; print_record(); return 0; } /* Input Students scores */ void input_score(void) { int i, j; for(i = 0; i < 4; i++) { printf("%dst Student...\n", i+1); for(j = 0; j < 4; j++) { printf("Input %dst subject : \n", j+1); scanf("%d", &record[i][j]); } } } /* Save Total Score */ void save_total(void) { int i, j; int std_total, sub_total; for(i = 0; i < 4; i++) { std_total = 0; sub_total = 0; for(j = 0; j < 4; j++) { std_total += record[i][j]; sub_total += record[j][i]; } record[i][4] = std_total; record[4][i] = sub_total; } } /* Printing Records */ void print_record(void) { int i, j; for(i = 0; i < 5; i++) { for(j = 0; j < 5; j++) printf("%d\t", record[i][j]); putchar('\n'); } }