C++ Primer第五版课后习题第一章

C Primer 第五版第五版 课后习题第一章课后习题第一章 练习 1 3 include include 简单主函数 输出 Hello World int main std cout Hello World std endl system pause return 0 练习 1 8 第三条语句错误 其他都正确 练习 1 9 include include while循环 将50到100的整数相加 int main int sum 0 value 50 while value 100 sum value value std cout Sum of 50 to 100 inclusive is sum std endl system pause return 0 练习 1 10 include include 使用递减运算符在循环中按递减顺序打印出10到0之间的整数 int main for int value 10 value 0 value std cout value std cout std endl system pause return 0 练习 1 11 include include 用户输入两个整数 while循环打印出这两个整数所指定范围内的所有整数 int main std cout Please enter two numbers val1 val2 if val1 val2 int tem val1 val1 val2 val2 tem while val1 val2 std cout val1 val1 std cout std endl system pause return 0 练习 1 12 include include int main int sum 0 for int i 100 i 100 i sum i std cout sum std endl system pause return 0 Sum 的终值是 0 练习 1 13 include include 用户输入两个整数 for循环打印出这两个整数所指定范围内的所有整数 int main std cout Please enter two numbers val1 val2 if val1 val2 int tem val1 val1 val2 val2 tem for int i val1 i val2 i std cout i std cout std endl system pause return 0 练习 1 16 include include 从cin读取一组数 输出其和 int main int sum 0 val 0 while std cin val sum val std cout Sum is sum std endl system pause return 0 练习 1 17 练习 1 18 include include 统计输入中每个值连续出现的次数 int main int curr val 0 val 0 if std cin curr val int cnt 1 while std cin val if curr val val cnt else std cout curr val occurs cnt times std endl curr val val cnt 1 std cout curr val occurs cnt times std endl system pause return 0 练习 1 19 include include 用户输入两个整数 while循环打印出这两个整数所指定范围内的所有整数 int main std cout Please enter two numbers val1 val2 if val1 val2 int tem val1 val1 va