【C语言】手动输入一串字符串，如“sa112sa2shz1.23x”,输出结果是11221.23

【C语言】手动输入一串字符串，如“sa112sa2shz1.23x”,输出结果是11221.23

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#include 
intmain(intargc,char*argv[]){
    chars[50]="sa112sa2shz1.23x";
    inti,t;
    doublek;
    for(i=0;s[i];i++)
        if(s[i]>='0'&& s[i]            sscanf(s+i,"%lf%n",&k,&t);
            printf("%g ",k);
            i+=(t-1);
        }
    printf("\n");
    return0;
}

#include #include #include #include #define LEN 100 int main(int argc, char const *argv[]) { int real_len;//字符串真实长度 char * s_save; int i = 0; int k = 0; int is_blanked = 0; char *s = (char *)malloc(LEN); if(s == NULL) { printf("malloc failed\n"); return -1; } s_save = (char *)malloc(LEN); if(s_save == NULL) { printf("malloc failed\n"); free(s); return -1; } printf("输入字符串:"); scanf("%s",s); real_len = strlen(s);//获取字符串长度 for (i = 0; i { if(isdigit(s[i])) { s_save[k++] = s[i]; is_blanked = 0; } else { if((i>0)&&(s[i] == '.')&&(isdigit(s[i-1])&&isdigit(s[i+1])))//如果当前字符的前面一个字符和后面一个字符是数字，则保留字符. { s_save[k++]=s[i]; is_blanked = 0; } else { if (is_blanked == 0) { if(strlen(s_save) == 0) { s_save[k]=' ';//除此之外，用空格表示 } else { s_save[k++] = ' '; } is_blanked = 1; } } } } printf("%s\n",s_save); free(s); free(s_save); return 0; }

过滤取出数字和 . 再看看别人怎么说的。