1、
#include <stdio.h>
int main(void) { int i, j; int a[6][2]; puts("please input the elements of the 6 * 2 matrix."); for (i = 0; i < 6; i++) { for (j = 0; j < 2; j++ ) { printf("a[%d][%d] = ", i, j ); scanf("%d", &a[i][j]); } } int majorsum[2] = {0}; int majormean[2]; for (i = 0; i < 2; i++) { for (j = 0; j < 6; j++) { majorsum[i] += a[j][i]; } majormean[i] = majorsum[i]/6; } for (i = 0; i < 2; i++) { printf("majorsum[%d] = %d\n", i, majorsum[i]); printf("majormean[%d] = %d\n", i, majormean[i]); } puts("--------\n--------\n---------"); int studentsum[6]; int studentmean[6]; for (i = 0; i < 6; i++) { for (j = 0; j < 2; j++) { studentsum[i] += a[i][j]; } studentmean[i] = studentsum[i]/2; } for (i = 0; i < 6; i++) { printf("studentsum[%d] = %d\n", i, studentsum[i]); printf("studentmean[%d] = %d\n", i, studentmean[i]); } return 0; }
↓
#include <stdio.h>
int main(void) { int a[6][2]; int i, j; puts("please input the elements of the 6 * 2 matrix."); for (i = 0; i < 6; i++) { for (j = 0; j < 2; j++) { printf("a[%d][%d] = ", i, j); scanf("%d", &a[i][j]); } } int majorsum[2] = {0}; double majormean[2]; for (i = 0; i < 2; i++) { for (j = 0; j < 6; j++) { majorsum[i] += a[j][i]; } majormean[i] = majorsum[i]/6; } for (i = 0; i < 2; i++) { printf("majorsum[%d] = %d\n", i, majorsum[i]); printf("majormean[%d] = %.1f\n", i, majormean[i]); } puts("--------\n--------\n--------"); int studentsum[6] = {}; double studentmean[6]; for (i = 0; i < 6; i++) { for (j = 0; j < 2; j++) { studentsum[i] += a[i][j]; } studentmean[i] = studentsum[i]/2; } for (i = 0; i < 6; i++) { printf("studentsum[%d] = %d\n", i, studentsum[i]); printf("studentmean[%d] = %.1f\n", i, studentmean[i]); } return 0; }
