计算字符串中的数字，大小，写字母个数 #include <stdio.h> #include <ctype.h> #pragma warning (disable:4996) void fun(int *cd, int *cu, int *cs ) { char c; printf("用回车键结束输入！\n"); while ((c=getchar()) != '\n') { if (c>='0' && c<='9') ++*cd; if (c>='A'&& c<='Z') ++*cu; if (c>='a' && c<='z') ++*cs; } } main( ) { int cd, cu, cs; cd = cu = cs = 0; fun( &cd, &cu, &cs ); printf("数字的个数: %d\n", cd); printf("大写字母的个数: %d\n", cu); printf("小写字母的个数: %d\n", cs); }