C语言里不为人知的秘密(01)之常见使用
01)C语言中运算符sizeo
printf("%d \n", sizeof(short)); printf("%d \n", sizeof(int)); printf("%d \n", sizeof(long)); printf("%d \n", sizeof(float)); printf("%d \n", sizeof(double)); printf("%d \n", sizeof(char));
02)遍历26个英文字母
使用 putchar 和 printf
char ch; for(ch = 'A' ; ch <= 'Z' ; ch++) { putchar(ch); } printf("\n"); for(ch = 'A' ; ch <= 'Z' ; ch++) { printf("%c",ch); }