练习1-13

第一步：

建立数组，并打印出不同长度的单词数目：

#include<stdio.h> main() { int c, i; int length = 0; int pitLock = 1; int charLen[10]; for (int i = 0; i < 10; i++) charLen[i] = 0; while ((c = getchar()) != EOF) { if ((c >= 'a') && (c <= 'z') && (pitLock == 1)) { length++; } else if (pitLock == 1) { ++charLen[length - 1]; length = 0; } else pitLock = 0; } for ( i = 0; i < 10; i++) { printf("length = %d: %d\n", i + 1, charLen[i]); } }

第二步：

调用函数实现星号直方图打印

#include<stdio.h> void print_star(int); main() { int c, i; int length = 0; int pitLock = 1; int charLen[10]; for (int i = 0; i < 10; i++) charLen[i] = 0; while ((c = getchar()) != EOF) { if ((c >= 'a') && (c <= 'z') && (pitLock == 1)) { length++; } else if (pitLock == 1) { ++charLen[length - 1]; length = 0; } else pitLock = 0; } for ( i = 0; i < 10; i++) { printf("length = -: M |", i + 1, charLen[i]); print_star(charLen[i]); } return 0; } void print_star(int num) { while (num) { printf("*"); --num; } printf("\n"); }