今天刚刚看了数组...就做了老师留的实验...但是发现很多不懂的，想问一下这个程序为什么第四部分不能运行...怎么解决呢？
程序代码：
#include <stdio.h>
#include <stdlib.h>
int main()
{
char dna[200];
char mrna[200];
int length;
int i;
printf("请输入DNA单链序列(大写字母)：\n");
gets(dna);
length = strlen(dna);
printf("%d\n",length);
printf("%s\n",dna);
/*第一部分，输出标准格式的DNA单链*/
printf("您所输入的DNA单链为：");
for(i = 0;i <= length-1 ; i++)
{
printf("-%c",dna[i]);
}
printf("-");
putchar('\n');
/*第二部分，输出对应的互补DNA单链*/
printf("其所对应的DNA单链为: ");
for(i = 0; i <=length-1 ; i++)
{
if( dna[i] == 'A')
printf("-T");
mrna[i] = 'T';
if( dna[i] == 'T')
printf("-A");
if( dna[i] == 'G')
printf("-C");
if( dna[i] == 'C')
printf("-G");
}
printf("-");
putchar('\n');
/*第三部分，输出对应的mRNA序列*/
printf("对应的mRNA序列为： ");
for(i = 0; i <= length-1 ; i++)
{
if( dna[i] == 'T')
{
printf("-A");
mrna[i] = 'A';
}
if( dna[i] == 'A')
{
printf("-U");
mrna[i] = 'U';
if( dna[i] == 'G')
{
printf("-C");
mrna[i] = 'C';
}
if( dna[i] == 'C')
{
printf("-G");
mrna[i] = 'G';
}
}
printf("-");
putchar('\n');
printf("%c",mrna[]);
/*第四部分，输出氨基酸顺序*/
printf("翻译合成的蛋白质的氨基酸序列为： \n");
for( i = 0; i <= length-4 ; i++)
{
if( mrna[i] == 'U' && mrna[i+1] == 'U' && (mrna[i+2] == 'U' || mrna[i+2] == 'C'))
printf("-苯丙氨酸");
if( mrna[i] == 'U' && mrna[i+1] == 'U' && (mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-亮氨酸");
if( mrna[i] == 'U' && mrna[i+1] == 'C' && (mrna[i+2] == 'U' || mrna[i+2] == 'C' || mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-丝氨酸");
if( mrna[i] == 'U' && mrna[i+1] == 'A' && (mrna[i+2] == 'U' || mrna[i+2] == 'C'))
printf("-酪氨酸");
if( mrna[i] == 'U' && mrna[i+1] == 'A' && (mrna[i+2] == 'A' || mrna[i+2] == 'G'))
break;
if( mrna[i] == 'U' && mrna[i+1] == 'G' && mrna[i+2] == 'A')
break;
if( mrna[i] == 'U' && mrna[i+1] == 'G' && (mrna[i+2] == 'U' || mrna[i+2] == 'C'))
printf("-半胱氨酸");
if( mrna[i] == 'U' && mrna[i+1] == 'G' && mrna[i+2] == 'G')
printf("-色氨酸");
if( mrna[i] == 'C' && mrna[i+1] == 'U' && (mrna[i+2] == 'U' || mrna[i+2] == 'C' || mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-亮氨酸");
if( mrna[i] == 'C' && mrna[i+1] == 'C' && (mrna[i+2] == 'U' || mrna[i+2] == 'C' || mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-脯氨酸");
if( mrna[i] == 'C' && mrna[i+1] == 'A' && (mrna[i+2] == 'U' || mrna[i+2] == 'C'))
printf("-组氨酸");
if( mrna[i] == 'C' && mrna[i+1] == 'A' && (mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-谷氨酰胺");
if( mrna[i] == 'C' && mrna[i+1] == 'G' && (mrna[i+2] == 'U' || mrna[i+2] == 'C' || mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-精氨酸");
if( mrna[i] == 'A' && mrna[i+1] == 'U' && (mrna[i+2] == 'U' || mrna[i+2] == 'C' || mrna[i+2] == 'A'))
printf("-异亮氨酸");
if( mrna[i] == 'A' && mrna[i+1] == 'U' && mrna[i+2] == 'G')
printf("-甲硫氨酸");
if( mrna[i] == 'A' && mrna[i+1] == 'C' && (mrna[i+2] == 'U' || mrna[i+2] == 'C' || mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-苏氨酸");
if( mrna[i] == 'A' && mrna[i+1] == 'A' && (mrna[i+2] == 'U' || mrna[i+2] == 'C'))
printf("-天冬酰胺");
if( mrna[i] == 'A' && mrna[i+1] == 'A' && (mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-赖氨酸");
if( mrna[i] == 'A' && mrna[i+1] == 'G' && (mrna[i+2] == 'U' || mrna[i+2] == 'C'))
printf("-丝氨酸");
if( mrna[i] == 'A' && mrna[i+1] == 'G' && (mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-精氨酸");
if( mrna[i] == 'G' && mrna[i+1] == 'U' && (mrna[i+2] == 'U' || mrna[i+2] == 'C' || mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-缬氨酸");
if( mrna[i] == 'G' && mrna[i+1] == 'C' && (mrna[i+2] == 'U' || mrna[i+2] == 'C' || mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-丙氨酸");
if( mrna[i] == 'G' && mrna[i+1] == 'A' && (mrna[i+2] == 'U' || mrna[i+2] == 'C'))
printf("-天冬氨酸");
if( mrna[i] == 'G' && mrna[i+1] == 'A' && (mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-谷氨酸");
if( mrna[i] == 'G' && mrna[i+1] == 'U' && (mrna[i+2] == 'U' || mrna[i+2] == 'C' || mrna[i+2] == 'A' || mrna[i+2] == 'G'))
printf("-甘氨酸");
}
return 0;
}
是不是那个mrna[]用错了？该怎么用，才能给它赋值？
